SCIENTIFIC ABSTRACT KISELEV, A.V. - KISELEV, A.V.

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• Collection: Scientific Abstracts
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• Release Decision: RIF
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• Document Creation Date: November 2, 2016
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• Sequence Number: 10
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

The Adsorption Heat of the Vapors of Benzene and 2o-119-4-20/6o
Heiane on Quartz
a condensed powder there were interspaces with mostly 1600 tO
70o0 1. With'an increase of p/p from the beginning of hysteresis
to saturation about 70% of the surface disappear. A further dia-
gramt by way of comparisonj illuetrateB the isothermal lines of
the adsorption of the same vapors on a homogeneous silica gel
NZ-2. The desorption branch begins to decline steeply, near p/P R 0-7-
In this domain the adsorption on quartz is not yet rendered com-
plicated by any capillgry condensation in the interspace between
the particles. In the initial domain of mo'nomolecular fhling-up
adsorption on,quartz is greater than on silica gel Xa:-2, which
is connected with,the lower skeleton density of this silica gel,
Further details are given. A further diagram shows the dependence
of the heat of adsorption of benzene vapors uponthe absolute
value a of.the adsorption on quartz. After filling-off'of the
first two layers adsorption heat exceeds condensation heat only
-by 3%p and after the adsorption of 4 layers by 1%. Further re-
Card 2/3 Auction of the ~4 af:6f~adsorpt ion takes,place very,slowly~'The-.,---L~
agradual deprease of adsorption he7ii observed. The authors
then mention some numerical data dealing with this subject.
There are 4 figures and 18 references, 13 of which are Soviet.
ASSOCIATION: Moskovskiy gosudarstvennyy universitet im. M. V. Lomonosova
(19oscow state university imeni N.V. Lomonosov)

AUTHORS: Kiselev, A. V.,,Poshkuep D. P. SOV/20-120-4-4o/67
-
TITLE: ' -
The Energy- of the Coulomb Interaction Between the Hydroxyl
Group of Silica Gel and the Benzene Molecule (Energiya kulonovs--
kogoi vzaimodeystviya gidroksillnoy gruppy silikagblya's mole-
kuloy benzola)
PERIODICAL: Doklady Akademii nauk SSSR, 1958, Vol. 12o, Nr 4,
pp.- 834~ 837 (USSR)
ABSTRACT: In the computations discussed in this paper the hydroxyl.group,
is consideredAD be a system of two point charges the position:
of which agrees approximately with the position of the oxygen
atom and of the hydrogen atom. A formula is written down for
the energy of the Coulomb (Kulon) interaction between the
hydroxyl group and the benzene ipolecule; this energy was com-
puted for various aubcases,in a vertical position of the
hydroxyl group with regard,to the direction of the benzene ring..
The same energy-in-the case of a displacement of the hydroxyl,
group inside the,benzene ring depends only in a low degree -
on their mutual position and amounts to about 4-6 kcal/mol. This
Card 1/3 interaction energy decreases considerably outside the benzene

The Energy of the Coulomb Interaction Between the SOV/20-12o-4-4o/67
Hydroxyl Group of Silica Gel and the.Benzene Molecule
ring. Accordihg-to the data obtained, the energy of the
Coulomb interaction between the polar hydroxyl group and the
non-polar benzene molecule is high and in the formation of the
hydrogen binding in a given system it plays the decisive role
among the other interactions. The benzene molecule adsorbed on,
the surface of a completely.hydrated silica gel interacts
assentiaily,with one or with only a few hydroxyl groups; besides-#*
such an adsorbed benzene molecule also interacts with the
other atoms of the lattice of the silica gel. Therefore the
removal of the hydroxyl groups from the surface of the silica
gel is bound to decrease the heat of adsorption of thebenzene
molecules.on the dehydrated surface of the silica geld Besides-p
the energy of,the interaction of the adsorbed benzene molecule
must be increased wi-th the.volume phase. The comput ed energy
of the Coulomb~inter~"ion (about 4-6 kcal/mol) agrees satis-
factorily with the experimental values of the decrease of the,
adsorption heat of benzene in the dehydratization of the surface
of silica..gel. There are I figure and 2o references, 7 of which
Card 2/3 are Soviet..
%tP, NZ

-The Energy-of the Coulomb Interaction Between the SOV/2o-120-4-4o/67
.,Hydroxyl Group of Silica Gei.and,the Benzene Molecule
ASSOCIATION: Moskovs,kiy gosudarstvennyy universitet im.M.V.Lomonosova
(Moscow State University imeni M.V.Lomonosov) Institut fiziches-
koy khimii Akad.emii nauk SSSR (Institute of Physical Ghemistry
AS USSR)
PRESENTED: January 18t 1958, by A.K.Frumkin, Member, Academy of Sciences,
USSR
SUBMITTED: January 18, 1958
radicals--Cherhical~ A,
'I Hydroxyl, -:r6actions 2. Benzenes--chemical rew--_,~~ ~i.,
actions 3. Benzene molecules-Adsorption 4. Silicon dioxide--Ghemi_-_
cal properties -.5. Chemical reactions-Energy
Card 3/3

:~W
AUTHORSt Ki .seley,'A, V., Neymark, 1. ye.p SOV/62-59-2-7/40.
Poshkua, D. P., Piontkovskaya, U. A.
TITLE3 Change of Porous Structure of Magnesium Hydroxide During Heat
Treatment.(Izmeneniye.poristoy struktury gidrookisi magniya
pri termicheskoy obrabotke)
PERIODICALt Izvestiya,Akademii nauk 5SSR. Otdeleniye khimicheski.kh nauko
1959, Nr,2, pp 232-237 (USSR)
ABSTRACT: In the present paper the change of the porous structure of
magnesium hydroxide during heat treatment in the vacuum was
investigated in a broad temperature range. It was f ound that
0
the magnesium:hydroxide pumped off at 200 repre sent s , iL
broad.-porous sample (dl-450 2) with large pore volume
0-71 am
3/g). The values of the specific surfaces of
the skeleton and of the adsorption layer s'are approaching,
one another in the initial sample. This indicate6:that.there-
in micropores are occurring to practically no extent, which,
are filled up in the primary adsorption process without
hysteresis. On the transition of this hydroxide into oxide
Card 1/3 the specific surface is considerably increased at 350' (by

Change of Porous Structure of Magnesium Hydroxide SOV/62-59-2-7/40
.During Heat Treatment
about the 3-f
old). Volume and size of the pores in which
capillary condensation takes place remain, however, unchanged.,-,.,.,
The formation of the mior,o-structure,is due to water.separa-
tion from the hydroxide.lamellae and to the transformation of
the orystal.structure of Ug(OH )2 into Mgo structure at which
0
the molar volumes are different. At 350. the sample is of
bi-dispers.e structure; it keaps the homogeneous coarsely
pdrbus structure of the ir2ial substance but the walls of this
structureare traversed by fine pores (cracks). A further
0
increase of the calcination temperature up to 500 causes
already a certain agglomeration of the micro-structure, as the
specific surface becomes smalle 9. On a further increase in
temperature up to 1000 and 1400 also the large pores are
oonsiderably',oontracted. In consequence of this not only the,
size but also the surface of the adsorption layer s'&nd the
volume of the pores de.ct:ease. In samples obtained at
1400.0 the size of the specific surface a is getting nearly
as large as-the size of the adsorption layer s. This means
Card 2/3 that in this.sample the fine pores disappear and the str~ucture

Change of Porous Structure of Magnesium Hydroxide SOV/62-59-2-7/40
During Heat Treatment
passes over again from a bi-disperse (fine and coarsely
porous) into A homogeneous coarsely porous one. There are
3 figurest: I tablet and 23 references, 12 of which are Soviet.
ASSOCIATIONt Instituty fizicheskoy khimii Akademiy nauk SSSR i USSR (JnStitut4ES
of Physical Chemistry of the Academies of Sciences, USSR and
UkrSSR) Moskovskiy gosudarstvennyy universitet im M. V..
Lomonosova (Moscow State University imeni M. V. L6monosov)-
SUBMITTEDs July 1, 1957
Card 3/3

5(4)
AUTHORS-,.
TITLE:
PERIODICAL,.
ABSTRACT:
Card 1/3
Kiseleyf,-A. V.p Lygin, V. 1. SOV/62-59-3-5/37
Electron-microse.opic Study of Porous Structure of Magnesium
Hydroxide and, It.6,Change6 Associated With Thermal Treatment
(Elektronno-mikrookopicheakoye issledovaniye poristoy'-struk-
tury gidrookisi-.magniya i yeye izmeneniy pri termicheskoy
obrabotke)
Izvestiya Akademii nauk SSSR. Otdeleniye khimicheskikh nauk,
1959, Nr 30 n_412-416 (USS11)
In the.present-paper,the mIacroporous.structure of magnesium-
hydroxide samples and products of their thermal-decomposition
was investigated by means of carbon copies. As investigAtiont
objects-the homogeneously wide-porous magnesium-hydroxid e
samples.calcined at 2000 and the magnesium-oxide.samples 'ob-.
tained from,them by means of calcination at 1,000 and 1,400'
were. u.sed. The~recordings of the carbon copies:and samples..
An t light.were,takenLin the electron microscope UEM- .100
a
ga s
.at avoliage of 60 kv. The skeleton of magnesium hydroxide
has al,corpuscular structure and consists of laminar crystals.'
lit es (kigs.293). Some of these crystallites have a strongly'
hexagonal and some a distorted form. On the

Electron-microscopic Study,of-,Porous Structure of SOV/62-59-3-5/37
Magnesium Hydroxideand lts~,.Changes.AsBociated With Thermal Treatment
stereo-microphotogTaphy (Pig 6) carbon copies of samples whi.ch_
were calcined-in vacuum at 1,0000 are shown. The datalobtained
by elactron-midroscopio investigation as well as the ddtermi-
"nation results obtained by the adsorption method (RefJ3),are
given.in the.Itable.,Itwas found that the calcinationlof the
initial.sampletrin vacuum at 1,0000 is followed by a condea-:
sat:Lon- of.,Ahe_ original structure .(the diameters of the pores
decrease.down-to 300-350 R). The laminar form, howeveri, is.
maintained.-This indicates that the changes.observed in ad~-
sorption measuremen -ts (Refs 13,15) of the specific ou rface
during 'calcination,in the.temperature range of 200-1,0000-
Are mainly..conn.eated with the transformation of the.-struc-m
ture-within.the hydroxide lamellae. The form of the lamellaO
andmide-porous skeleton formed by them does,not vary,con-
siderabli.-Thus the,.electron-microseopic investigation..con-
y
firmd..the'conclusion drawn from the adsorption measurements
(Ref 13) regerd-ing--the.formation and disappearance of the
bidisperse structure in the course of thermal treatment.
Quite a different character is exhibited by the.hydroxide
Card 2/3 sample calcined at .1,4000 (Fig 4). The stereo-microphotograph

Electron-microscopic Study.of,Porous Structure of SOV/62-59-3-5/37
Magnesium 11ydroxide and Its'Changes Associated With Thermal Treatment~
shows an extremely-porous out and the lamellae do not appear
any longer. This is apparentl y a consequence of the agglomer-
ation of.some lamellae taking place at this temperaturd%and
of the considerable growth of crystallites within the lamellae.'.
At the sam6,time.the general character of the macroporous
,structure is maintained,also at these calcination,tomperatures.
This is likewise in accordance with the determination results
obtained by the adsorption method. There are 7 figures,
1 table, and 16 references, 13 of vhich are Soviet.'
ASSOCIATION: Moskovskiy gosudarstvennyy universitet im. M. V. LomonoGov.a
oscow State University -imeni M. V. Lomonosov)
(M
Institut fizirhe-skoy khimii Akademii nauk SSSR (Insti tute:o.f~
Physical. Chemistry of the Academy of Sciences, USSR),
SUBMITTED: July 69 1957
Card 313

AUTHORS: Avgul -Berezinf G. I., SOV/62-59-5-5/40
Kiselev, A. V.0 Lyginal I. A.
I------------
TITLE: Adsorption.Heat of a N=ber,of Isoalkanes Haphthenes and of Toluene
on Graphitized Carbdn Black (Teplota adsorptsii ryada izoalka-
nov, naftenov i toluola. na grafitirovannoy sazhe)
PERIODICAL: Izveatiya Akademii nauk SSSR. Otdeleniye khimicheskikh nank,
1959, Nr 50 pp 787 - 796 (USSR)
ABSTRACT: In this Work the following hydrocarbons were investigated as to
their adsorption.-heat: three isoalkanes (neohexaney isoheptane,
and isooctane), two alicyclic hydrocarbonsi cyclopentane'and
methyleyelopentane, and the alkylaromatic compound toluene. The
hydrocarbons had-been selected in this way in order to investi-
gate the effect-of the chain branchingp the ring formation of
these chains, 'and the introduction of aliphatic substituents
into the naphthe.ne and-benzene ring on adsorption. The hydro-~
carbons*used in
-the investigations had been synthetized at the
,
Institut organicheskoy khimii AN SSSR (institute of Orgazz"Jlc
mistry of the.AS, USSR) by Ye. A. Mikhaylova, A. F. Platef A. L&
Liberman, and S. V. Zotova. The authors express their gratitade-
Card 113 for their help. The constants of these substan-ces are s-ummaziz-

Adsorption Heat of aNumber.of Isoalkanles, Naphthenes SOY/62-59-5-5/40
and of Toluene on Graphitized,C"bon.Blaok
ed in table 1. "SferorP-6 was used as adsorbentl it was graphi-
tized at 1706,.-The.differential adsorption heat.was determir.'ad
at 200 in.a,cal'otim-eter with constant heat exchange; the amolvit
of the adsorption was determined by means of a capillary vacaam
liquid microburet.Tigures 1, 2 show the isothermal lines of.
adsorption of the various substances and figures 3. 4 show the
dependence OfLthe d-ifferential adsorption heat on the amount
of heat adsorbed by the individual substances. The figures show
that the normal adsorption heat of isoalkanes and naphthenes is
lower than.that of the corresponding n-alkanes. The value of
the addorption.heat of cyclopentane amounts to only half of
that of.n-pentane. Cyclopentane, therefore, shows greater at-
traction towards theadsorption layer, its isothermal line of.-
adsorption is concave at its beginning. It can be seen from the
thermodynamic evaluation of the experimental data obtained that
the isothermal line of adsorption of cyolopentane cannot be re-
presented by the Langmuir equation or BLT equation but by an
Card 2/3 equation whichallows.for the interaction adsorbate-adsorbate

Adsorption Heat of a Number-of Isoalkanest Haphthenes SOV/62-59-5-5/0
and of Toluene on Graphitized-Carbon Black
..,The 'en
tropy curves (Fig 6) indicate that the state o.f
(Fig 5)
,
-
isoalkanes and naphthenes.in.the dense adsorption layer 6n,gra-,.-,
phite is.much closer to the liquid state-than that.of n-alka-;.,..-
nes. The methyl-group in the toluene molecule.roduees it6-mo-
bility with respect to the unsubstituted benzene and-the other
purely.oyclio compounds..With regard to the theoretical calou-
l~
lation
of adsorption heat it was assumed thats in the case of
l
-
the ramified hydrocarbons, the adsorption heat is-an additive,
function-of the number of carbon atoms in the molecule. The
free adsorption energy and the surface of the adsorbent accu-1
pied by-moleculeswere determined according to the same ass Iump-
tion. There are 6 figures, 3 tables, and 17 references
,12 of
,
which are Soviet.
'ASSOCIATION: Institut-fizicheskoy khimii Akademii naiak SSSR (Institute of
Physical Chemistry of the Academy of Sciences, USSR).,
SUBMITTM: July 25, 1957
Card 3/3'~

5 '(4)
AUTHORS: Kiselev A V Kovaleva, N. Ve SOV162-59-61-4M
TITLE: 'The, Influence Itcercised by the Thermal Treatment of Different 1:1
Carbon Blacks V~on the -Adsorption of Vapours (VlijauVie termi-w
cheskoy'obrabotki razlichnykh sazh na adsorbtsiyu-parov):
PERIODICAL: Izvestiya~Akademii nauk SSSR. Otdeleniye khimicheskikh1nauk, -
195% 1qr 61 pp 989-998,(USSR)
ABSTRACT: As ia well knov rn,~ an-increase in treatment temperature causes 8;1
inerqase_in this arystal,dimension up to parallel orientation,-as
is the case. with the graphite lattice. Besides, there. are
numerous papers which deal with.the investigation mentioned in
~the title'(4efs' 1-40).
It.is only the problem of the fundamental'-
.
adsorption changes of different substances that has scarceli,been
dealt-w'ith up.to now. As-to this.problem there are different_,,.,
opinions Ias to_wheth_er,the~'presence of oxygen complexes dai---,~the
.~,~I
surface ot.the' adsorbents, or the inhomogeneity ofthe~s aaw.-.-
,.-
.
I
are to-be-mad6-res nEfible for the adsorption. In this
_po
connecti6n,i:the "Aasorption was investigated in the present work,
(-roughly inhomogeneoust.
asbeing.dependent on the surface quality
stronglyt and weekly oxidized carbon black). Subject to
Card 1/3 investigation were substances with extreme structure arA polarity

The InfluenosExercioed by-theMermal Treatment of SOV/62-59-6-6/36
Oki n t~e:Adsorption.of Vapours
Different' Carbon Bld :UPO
such as benzene?" water, methanol. For this purpose the adsorption'.
isotherms, of the above mentioned substances on carbon black.
adsoibents ~ (pigs 1-6) submitted to different thermal treatment'*
were dete'rmined.'It was found that with inereasing'treatment
temperaturej the quantity of oxygen needed for the exchange.with
~NaOH in aqueous solution on the surface of the carbon black
decre -ases, :andlsd does the.,roughneab of Us, surface.--It remains
'homogeneou's:aft6r,~~reatinent.in.hydrogen at 17000.1 The steam-
adiorptio'XL,W,.gra'phite.Ltreiited- carbon blaek-which also decreases
is mainly, -due t6....the elimination- of surface oxi des. With
graphite -treated _'okrboir black; in a hydrogen current adsorption
of water, iA-.very_,_.1.oiwi- evvri:-at-high- pressure. The adsorption of
methanol vapours..aleo-d6creases by:-the.alimination :of the:surfa6e
oxiaes"_'While _th&_A4br_e'ase,: im~'- the -~surface -moughnes-5 there -only
a ad unimport e.' ne adsorption w V
PlAy ant rol -Benze ith aphite
treatment is Lmainly,reduced because of the adsorbent surface
which is not:rough.enough. In general graphite treatment in
hydrogen current at 17000 of different types of carbon black
leads to:4Uite:similar surface qualities of the adsorbent. The
Card 2/3- authors thank It. M. Dubinin for explanations he gave them.

5 (2), 5 (4)
AUTHORS; Avgull N. N.1 Kiselev, A. V..9 SOT/62-59-7-7/38
Lygina-,' 1.
TITLE: A Contribution :to -the, Calculation. of the Energy of the, A.daorption_'~,~
of Nonpolar.Molecules on Graphite-(K raschetu energii adsorbtaii
nepolyarnykh molekul-na giafite)
PERIODICAL: Izvestiya Akademii nauk SSSR. Otdeleniye khimicheskikh~naukp'.
1959,, Nr 7, pp 1196-1206 (USSR)
ABSTRACT: .In this papaf:.the'details of a calculation'of the adsorption
energies of simple and compound molecules carried.out,,in a
previoixs, paper are rep .resIanted. The caloulatiow were carried
out according:to the formulas-.from paper reference I according to
-hich. the-adsorption energy is determined by the expressions,

r- - 'o + B!Z: e-r j~
'C Y: .. Ci
iV 3
ij

Cil 6 -10 -12
r- - C C + B't ij
ii i2F- '_iJ i3Y ij 4
3.

rij 3.5 the.distance of the center of the i-th adsorption
Card 1A moleculefrom the center of the J-th atom.of the adsorbent#

A Contribution to the Calculation of the Energy of the SOV/62-59-7-7/38
Adsorption of Nonpolar Molecules on Graphite
C are constants of the dispersion reaction, BI and B" are.,
i1,293
the constant of the exponential fanction and the constant of.-.
the repulsion preceding the powers. 9 is an exponential constant
of the repulsion. The-calculation is oarried out in two Darts
the geometric~~one in which the distances of the adsorbed link
to all atoms j - of 'the lattice of the adsorbent, are oalualated foil.
different distances of.the former from the surface. For this.
calculation only the lattice constants of the adsorben.t~have
to be, known.-, Pot. the, second part 'of the calculat ion: of the, forced
the constants charaterizing the reactions of both substances,
have to,be determined, The calculation of the sums of r' was-
ij~
carried,out.Ifor n~= 6, ~0. 10 and 12 for the diff,erent-distances.,,,
of the adsorbed link from.the basia of the adsorbent equal,td*,
2t 2-5, 3t:30.5 a (a is, -the distance of the nearest atom),Jn
table I the results of the calculation of the sums
rr-n are-combined. The distances of the remaining gr'tILphite
ij
Card 2/4 volume were determined from the int -egrals (3)! (4)o (9 Tab e
1 2)

A Contribution to the Calculation of the Energy of the SOV/62-59-7-7/38.
Adsorption of Nonpolair Molecules -on Graphite
ri
n
The sums rij. .+ are represented in tables 4 and 5 and the:
-rij/0026
graphio-repres6ntation in figure 2. The value e
for 9 in table-6.wasequated to 0.28 according to reference 6.,
For the sums ~of,--tables+ 4, 5 a simplified formwith the constants:
pzx an4-q *-the values,6f which are given intable 7, is: introduced+,.
and the functions (1) and (2) are represented in the variable z
r f -qn)
(6), (7) + Next, the calculation of the
ij .7Pnz
n
reaction conBtant:c is carried out. The values+for,
1213
different adsorptives-are given in table 7 with the constants
OLand-W (pblarizabilit ' magnetic susceptibility) being
V,
necesoary-for the calculation of Cil,2-3. ~' and V were then
Card 3/4 deItermined by the aid of computed constants. The results for

A Contribution to the Calculation of the Energy of the SOV/62-59-7-7/38
Adsorption of Nonpolar Molecules on~Graphitel
are giv ,en2in tables 10 and,11. The calculation of the.attraction-
and,reptilsion.constants'was carried out from the balance enexg.,
,of the adsorption of compound molecules on the basis of an aa.ditive
scheme. There are.6 figures, 11 tables, and 8 references, 2 of
which are Soviet.
ASSOCIATION: Institut fizicheskoy khimii Akademii nauk SSSR (Institute of
Physical Chemistry-of the.Academy of Sciences,.UMR)
Kh3*.micheskiy:fakulltet Moskovskogo gosudarstvennogo universiteta:
im. 11. V. Lomonosava (Chemical Department of the Moscow State
University im'eni M. V. Lomonosov)
SUBMITTED: November 16, 1957
Card 4/4

5(4)- SOV/T6-33-2-2.3/45
AUTHORS: lsiril.-.Yan, A. A.,_Xizelov, A. V, Prolov, B. A.
TITLE: The Heat of Adsorption of Normal Alkanes on Silica Gels
(Teplota adsorbtsii nor-nallnykh alkanov na silikagele)
PERIODICAL: Zhurnal fizicheskoy khimii, 1959, Vol 33, Nr 2,
vp 3,89 -.394 (USSR)
ABSTRACT: In continuation of the work of previous papers (Ilafs,10,111
16 - 19) the heat of adsorption (m) of n-pentan,e.(I) and.
n-octane (Moon coarsely porous silica gels was measured.
An adsorption calorimetric apparatus was used which is a,
simplified variant (Ref.20) constrlicted in COODeration -dith
G. G. Muttik and which rill be described separately. As in
.the other papers (Refs 10,11,13,16) a homogeneously porous dh-
ca gel KSK-2.with a specific surface of 320 m2/g end a pore
diameter of a bout 100 R was used. A comParison of the ob-
tained,.absolute adsorption iqotherms (Fig 1) for (1) and.
(IT) with those for n-hexane --id n-heptane on. the same silica.
gel (Ref 10) chors*that the (AH) from pentan Ie to octane
increaces and it is not' possible -,,o apply the BET equation.
Card 1/ 2 Since the constant of the induction inter-action with the

The Heat of Adsorption of Normal Alkanes on Silica Gels SOV/76-33-2-23/45
electrostatic field is proportional to the polarizability
of the n-alkanes the general adsorption energy on,'Uhe silica
gel also increases linearly with the number of carbon atoms
in the molecule. The linear Ainctions Q0 of n ( n. number
a
of carbon ata~16)(Fig 3) and the standard differential (AH)
of the n-alkates were dc-ived for adsorption on silica Lis,
carbon black (Refs-4,5), M90 (Ref 7), and water (Hof 271.
The values for any particular n-alkane can be calculated
from the follo'i.iing equatio-no-
Adsorption on carbon black 0-7+1.9 n kcal/mol (n= number
of carbons)
nl /~Joj
MgO 4 1.5 nket
kcal/rol to
silica , e 1KSKI-9 QO= '.0+4.3 n
Heats of condensation L 0. r. k ca!/mol
Adsorption.on viat er Q 1 .7+0.7 "kcal/mol. There are
3~fid-ures, 1 table, and 27 references, 24 of which are Soviet.
ASSOCIATION: Mozqkovskiy gosudarstvenryy universitet im. M. V. Lomonosova
(Mobcor, State University imeni 11. V. Lomonos3v)
SUBMITTED: July 17, 1957
Card.2/2.,

5 ( 4)
AUTHORS: Belyakova,' L.D.9 Kiselev, A. V. 507/76-33-7-;-14/40
TITLE: Adsorption and Chemisorption of Methanol by Silica Gels With
Different Degrees of Surface Hydratioa
PERIODICAL: Zhurnal fizicheskoy khimii, 1959, Vol 33,,Nr 79 PP 1534 1543
(USSR)
ABSTRACT- It was already found in previous papers (Refs 4) that the
adsorption.(A) of methanol (1) by silica,gel W) depends
larEely on-the degree of,surface hydration, and that chemi-
zorption takes place. In the present paper, the authors in-
vestigated a variation in the adsorption and ehemisorption
properties of coarse-pored silica gels (UK-.2) (with respect

=
to (I)).which was due to great changes in the a 00,11-
('
0
OR
0H
oentration. of OR on the silioa-gel surface" in the case of
small structuralchanges of the pores. Experiments were made
in a vacuum apparatus,-(Fig 1) consisting of three separate mea-.
suring arrangements. The samples were annealed at various tem-
peratures (200 -~10200). The specific surface a of the sample
was determined from the (A) of nitrogen, and on the basis of
Card 1/3 these'daia and the.content of structure water the aul%ors

Adsorption and Chemisorption of Methanol by Silica SOY/76-33-7-14/40
Gels With Different.Degrees of Surface Hydration
0
calculated the values of aOH (Fig 2). Within the range 200 800
aOH falls pract.ioIally ina linear manner. Heating up to 9500
reduces s and v (total volume of the pores) only 'by 20~, while
the size of the pores (dF--1-00 1) does not vary. Heating up to,
0
1020.C,.howeverg decreases s and vB by about 75%, and d drops
to 55 - 70 1. A comparison (Table 1) of the quantity of irre-
versibly che'misorbed W.'a with a indicates that, con-
OCH on
3
trary to the-rapid physical adsorption, cc increases with
GCH
3
decreasing a The primary,(A) of (I) from KSK-2 (at 200')
''OH
proceeds much taster than on KSK-2 (at 6150') or Y-SK-2 (at1020
Kinetic curves.indioate that the chemisorption of W on the
hydrated surface.of (II) differs greatly from that on dehy-
drated surfaces. Experiments on thermal decomposition of the
Card 2/3 surface compound of (I) with (II) showed (Table 2) that only

Aasbrption and Chemisorption of Methanol by Silica S07/76-33-7-14/40
"els 17i,'.,h Different Degrees of Surface Hydration,
7~ of the irreversibly adsorbed substance are removed by heat-
ing to 2000 approximately. Methoxylation of the (ii)-surfaae
reduces the
(A)-of:(I)-vaporsy i.e. the reaction of.(I)*'4'L,,h.'
+he OR-groups of the (11)-surface is greater than the one with
the PCH~ groups. The chemisorption of (1) on (II) increase a
with decreasing concentration of the OH.-groups on the (11)-sur-
face. This is due to the surface me-LIhoxylation. In this process,
a reaction takes place between the OH-gro-ap of silicio acid,
and the bond SJ_ - 0 - S1 decomposes to form Si-OH and Si-OCH
3
groups. The adsorption of (1), water, and benzene decreases_
partioularly strongly (4 times approximately) within the range
aoff = 7 - 4 Pmol~~M in conclusions the authors thank V.
Bronshvagerl.and G. G. Muttik for.their assistance.-There are
8 figures, 2 tables, and 27 references, 24 of which are Soviet..
ASSOCIATION: Moskovskiy gosudarstvennyy universitet im. M. V. Lomonosova
(Moscow State University imeni 14. V. Lomonosov)
SUBMITTED: December 30, 1957
Card 3/3

5W.
AUTHORSt Gryazevp No No BOV/76-33-7-1.0/40
LEM
T
IT Adsorption Isothermal Lines From Three-companent,
Z
PERIODICAM hurnal fizicheskoy kUmii, IT.5-9, Vol 33, Nr 79 PP '581-1593
(USSR)
ABSTRACT.- The development of adsorption chromatography of wmiti-componsm-t
mixtuixres requires -investigation of the adsorption equ!_l11.j_.T4,
,.imp
if-se. of the adsorption isothermal lines (AI) of the oompcnents
of such mixtures'. The (AI) of the fDllcyring liquil tba-qel-orompsD-
neat solutions were investigated in this oaae: ceuans W
+ acetia a3id. II) + lauria a cid 'III), (I) + (11) .+ pqlmjti-~;
aoid (IV) and M.+ (II) + c,4-methyl naphthalene (V). The
authors chose these mixtures.,because (I) and (IV) Eelve the
puipose of.modeling the adsorptive xegeter aUon of n1ingral Oils;
on the other handi (iI) is soluble in (I) to a certain extsnl~q
while (III) and (IV) are perfectly soluble in (I) p and 'be--J%Use
the influence exercised by a variation of - tGhe solu1bility of the
three-oomponent solutions,.upon their adsorption can be
investigated. One of i~e most*a^-tive sedimentation rocks with a
Card -1.13
_Mv
nmwnw,

Adsorption Isothermal Lines From Three.-component SOV/76-33-7-20/40.
high silica content, called "opok" (Kr 120 from the area ronna
the village of.Kamennyy Yar, Etalingrad oblast') and an,
industrial XSK-4 silica gel were used as adsorbents. Thb~
characteristic values of the mixture componefits applied are
giver. Adsorption experiments vorere made by a method devilsed by
the Laboratoriya adsorbtsii Moskovskago universiteta(Laboratory
for Adsorption of Moscow University)(Ref 15). An ITR-2-intexr-
ferometer an& an IRP-22 Tefractometer were used for analyzing
the binary systems. The method of analysis of the three-cLmpo-
nent'solutions and the evaluation of the results obteLned a-re
described. Three -dime nsional diagrams illustrate the.resultant
(AI). The authors found that additions of the third component,to
the binary mixture decrease tile adsorption of the components and
change the course of the (AI). A change in the solubility of the
components from limited into unlimited solubility effects S
variation of the S-sha with a
ped Isothermal lines into nes
Card 2/3

Adsoz,ptlix-r, Isatherma'L Lines rrom Three-oomponent SOV/?-5-33-7-90 C
0 -XIS
maximum. The component that Is better adsorbed from the ~-inaxy
Mixture is also 'batter adsorbed from the thrse-aampoapntl,
Lafxture The absolute (AI) of the oomronents of the systems
ur-der iisoussion are similar for eat7h of the 41-wc employed
adso.rbents. There are 13 figwes and 18 refe:renies, 15 Of wh', oh
are Soviq~,.
ASSOCIATIONi Moskovskiy gosudarstvan;*7 mdvazei'et in. V.
(M-3soow St ty imen:L Y. V. I-:m-1Cn-zSCv)
ate Universi
SUBMITTED-. jawlanr 9,1958:
Oazd

5(4) SOY/2o-124-3-

Korolev,.A. Ya.,Shch bakova,K.D.
AUTHORS: elev A alevat N. V.
'
:V.
M _L_
vr
-*X
T
TLE
U
t
e e,
odi
,
icati n of
I
:
s Surface of Adsor
ben
b and
It's- Influence on Adsorption Properties (Khimicheskoye
modifitsirovaniy-e'poverkhnosti adsorbentov-i yego vliyaniye
na adsorbtsionnyye evoystva)
PERIODICAL: Doklady Akademii-nauk SSSR9 19599 Vol 124, Nr 3, pp 617-620
(USSR)
ABSTRACT: The present'-report deals with the chemical modification and
variation of,-the adsorption properties of silica and graphite
bodies. Hig4ly dispersive silica aerosil and gas-black are
used for this:purpoee..This modifj4cat~on was carried out
for the purpose'of rendering silica hydrophobic and of making
soot hydrophific.'The firIat-part of this paper deals with the.
modifioation'
~.of silice.4 Sil Pa with a hydrated outface ad-
,
sorbs poldr.substances well.-By a reaction with silicon'-organio
compounds-At,ispoesible.to modify the nature of.their our-,
fact essentially in the direction of -attaining a,stable.hydro-
phobic statep.which is of practical interest for the applica-
t1on of silica as filling media for polymeric materials and-
as a thickening medium for lubricants. The modification con-,
sisted of a reaction-of silica hydroxyl with trime-thyl chloro-'.,..
Card 1/4 silane according-to the scheme
- Ml~
~gg

SOV/2,D-124-3-35/67.
The Chemical Modification of the Surface of Adsorbents and ',n8: Influence
on Adsorption Properties
0 CH 0 CH3
-0-Si-OH+Cl-Si-CH -0-Si-O-Si-CH +HCl
3 3
0 CH 0 CH
2/g
Aerosil with a surfaoe-of about 1F m was treated for
eight days at a temperature of 20 with saturated trimethyl
chlorosilane'vapor.or,with its solution in benzine. The
greatest difference in the isothermal lines of adsorption
is observed in,steam. The adsorption of steam on a modified
sample is several dozens of times lower than in the case
of a normal.s.ample. The.isothermal line of the.adsorptio,n
of steam on-a modified sample is reversible, and it Iis
not modified even after several months of contact with
waterv whichis indicative of the strength of the surface
compound formed. The second part of this paper deals
Card 2/4 with the formation of carbon black. The adsorption proper-

SOV/20-124-3-35/67
The Chemical Nodification of the Surface of Adsorbents and !t-4 Influence
on Adsorption Properties
ties of soot with respect to many adsorbed substances, especial-
ly with respect to polar ones, depend on the quantity of
oxygen they contain. The authors modified gas black.for the
purp8se of further graphitization. By annealing at more *than
1500 the acid surface compounds are destroyed, the.growth
of graphite cryst.allites.is promoted (chemical and crystallo-
chemical modification) and the adsorption of the vapors of
watert methanol, ammoniag methylamine, sulfur dioxide and
other polar substances is considerably reduced. Thermal
treatment, especially.at temperatures of more than 25000,
makes the soot-surface more homogeneous and prevents the
adsorption of non-polar substances. Such a treatment of soot
also increases-its hydrophobic properties. An increase of the
affinity of soot to,polar substances. especially water, is
of practical interest,for polygraphical pigments and also
for other polygraphically important cases. Also the nature
of the surface and the colloid-chemical properties of soot
Card 3/4 are considerably modified by the oxide-treatment. The modi-

SOV/2o-124-3 35/67
The Chemical Modification of the Surface of Adeorbents and Their Influence:----
on Adsorption Properties
fication of,soot also modifies the adsorption of steam con-
siderably. The variations of the corresponding isothermal
lines-are diicussed. The double hysteresis found,,on this
occasion is-typioal of the superposition of two phenomena,
viz ohemosorption and capillary condensation. The thermal.
treatment of soot and its oxidation in the liquid--phase is
able to modify soot to such an extent that the adsorption
of steams on it is modified by dozens and hundreds of
times of its amount. There are 2 figures and 25 references,
12 Pf which are.Soviet.
PRESENTM: September 6, '1958, by M. M. Dubining Academician
SUBMITTED: September 5, 1958
Card 4/4

lax
g.k E a
.1 p
a-3 *A 4A :jj:~j
u;; c I - I o a
".4m,
laviv s
-1 =~.V!
Bit 'r
Lo"o
Amik
o
lip: o 10; a a
-------------
~7777777-17,~~

PEASE I BOOK XVLCXTATION SOV/4"l
Nelftwsavskaye soveshchanlya PC khtmil nertil Moscow, 1956.
Sboralk trudov Methvuzovskogo boveshchanlya po khimii neftl
tion of Transactions of the Inter-UnIveralty Con-
ic=": on Petroleum Chemistry) (Moscow] Izd-vo Moak.
univ., 2960. 313 V. Xrrata allp Inserted. 1,600 4oqI4s
printed.
Organizing Conmaittee of the Conferences Chairmant B. A.
Kazanskiy, Academician; Vice-Chairmant S. 1. Khromov#
Docentj 0. X. Panahenkov, Professorl A. Y. Plate, Pro-
Teseer; Secretaryt Ye. S. Baaankova, Scientific Worker.
Zdltoria2 Board: Romp. Ed.s A. P. Plate; 1. V, Goatun-
key-, 1. N. Tits-Skvortgo% L. A. grivanakeya.
PURPOSE. Thin collection or articles Is Intended for the
tqachUg staff at' unlvaraLtles and schools of higher ad-
ucation training specialists for the petroleum and patrol-
*ues-refining Industries.
Card 1~T
tCn:NAGZj__7be collection includes articles dealing with the
M present state Of the patrol*= Industrys the scientific
research problems In petroleum chemlstr7~ the chomistr7
Of o , the composition or petrels= and petroleum
r
ts!T* scientific principles of refining petroleum
I,r=
into motor fuels and lubricantes and the maroifacture of
eyoth*tjo products from hydrocarbon Sues and petroleum-
one article discusses the effect of chemical composition
and additives an fuel combustion In jet engines. The 03-
terlAa max presented at the Inter-University Conference
.00 Petroleum Chendstr7o bold at the Moscow State UnLyartl-
-2B, 1956. No periwoct-
ty la"I X. Ir. 14monasov November 26
alitlas are mentioned. Reforenoes.accoupwr most of the

TANA OF CONTINTS I None given

~
The authors and the titles of articles are as followst
'
Kazanskly, Academician
lotroducticn
by B. A.
C.-d. 2/7

Collection of Transactions (Cont.) SOV/4941
_nselev,_A,_V.,, Laboratoriya adsorbtaii Moskovskogo
gosudarstvennogo, universiteta (Adsorption Laboratory of
the Moscow State University) and Laboratoriya sorbtsionnykh
protsessov Instituta fizicheskoy khimii AN SSSR (Labora-
tory oi Sorption Processes, Institute of,Physical Chemi-
stry, AS USSR). Hydrocarbon Adsorption Energy
Paushkin, Ya. M., R. V. Sychev, T. P. Vishnyakova, and
A. K. Zhomov, Moscow Petroleum Institute imeni I. M.
Gubkin. Effect of Chemical Composition and Additives on
Fuel Combustion in Jet Engines 293
AVAILABLE: Library of Congress (TP690.AlM445 1956)
JA/iorc/ec
lip 4-20-bl

5.1190 77935
sov/65-6o-3-8/19
AUTHORS-. K*3elev A V Nikitin, Yu. S.
TITLE: The Effect of:,Production Conditions of Alumina-Silica
Gels on.Structure.of Their Pores
PERIODICAL: Xhimiya i tekhnologiya topliv,i masel, 1960, Nr -3,
Pp. 35 -42 (USSR)
ABSTRACT: The structure of pores.-of alumina-silica gels was studied
;in relation to thp amount of Al 0 in catalysts prepared
2 3
.The results of experiments are
by the alumina,method.
.,
shown.in Tablel., Four additional samples,of alumina-
silica gels.were prepared from solutions of lower con-
centration containing two-fold lesser amount of-dry
substance. -The.results of analysis of their pores are
.shown in Table-2. There are 4 figures; 2 tables, and'15
references; 10 Soviet; 5 U.S. The 5 U.S. references
are: Plank, C _' ',J. 'Drake, L.. C., J. Coll. Sci., 2, 399
'
(1947); Plank -C.
J., J. Coll. Sci., 2, 413 (1947);
Card l/V Ashley, K. D.J Imes, W. B., Ind. Eng. Chem., 44.,2

68700

_67 V'2 Do
00
AUTHORS
and-Poshkus, D.P.
Kiselevi. 4.

TITLEi *The.- Heat;.-.and Entropy .ofi.Adsorption of..Benzene and-N-
he 'jVapors_-_o_n_M-g esium'Hydroxide
xane n
PERIODICAL: Kolloidnyj~-zhurnal-, 1960, Vol XXII, Nr 1, pp 25-30
'(USSR)
.ABSTRACT.- The _authoj~s -report -on a-study intended., -to determine tlie', ,
heat:'. and-
entropy...--o-f-nbLdsorption~of benzene and n"hexane
.
Vapoj7s on magneslum-Eydroxide,with weakly d~
h44i-ated
-
'
'
,
-surf ace.
As ~adb6j~bbd
authors selected a (6H)
, the
2
SpScimen moderately--freed of'water at a temperature of
*
-
s de-
The differential heat.of--adsorbtion Q wa
20 U.
a
termined.from the-isotherms 'of adsorption on the given
specimen. The.isotherms were getermined at the tem-
peratures T and, T (10 and 30 C) according to the
2
formula .
.Card 1/4

68700,
S/069/60/022/0,1/005/025
D034/DO03
The'Heat.and Entropy of Adsorption of Benzene-and N-haxan Vapors.on.
Magnesium.Hydroxide
be determined __frox.';isotherms~ as-presented in a pre--
vious publication of,the authors fRef. 22) The
investigation,has"shown that the standard heat of
-3 specimen
adsorption of benzene vapors on the'Mg(HO)
.2
is greater than. the: standard heat of adsorption of PI
n~hexane vapors (gbaph.l). A comparison of the stan-~
dard heats of,adsorptlon on various adsorbentB (table.,
and graph I4):makes evident that the heat of adsorption
of benzenevapors,on polar,adsorbents is greater or
close to the heat.of adsorption of hexane, whereas
,on a non-polar adsorbent the heat of adsorption of
benzene is considerably below the,-heat of adsorption
of n-hexane. The-increase in the ratio of the heats of
adsorption of benzene and n-hexane vapors on polar ad-
sorbents as compared to.this ratio on a non-polar
Card 3/4

68700
S/069/60/022/01/005/025
D034/D003
The Heat and Entropy of Adsorption of Benzene and N-hexane Vapors on
MagneBiUM Hydroxide
adsorbent-(graphitized carbon black) is explained as
dtie mainly to the stronger electrostatic interaction
of benzene moleculesq as compared to the interaction,.
with the-electric field at the polar ad-
of hexane,
,
sorbent surface. There are 4,graphs, 1 table and 13
references, 11 of which are Soviet, 1 English and 1
German.
ASSOCIATION: Moskovskiy universi-tet im. M.V. Lomonosova, Khimi-
cheskiy fakullt6t,:Laboratoriya adsorbtsii - In-
stitut fizichesko :khimii AN SSSR, Laboratoriya.
Y.
sorbt si onnykJ3L: -PrOtSeS Soy (Mogg- Universit im.
M.Y. Lomonosoy '-Chemical Department, Laboratory of
Adsorption - Institute of Physical Chemistry AS USSRI
Laboratory of Sorptive Processes)
SUBMITTED. September 3V 1958
~Card 4/4

8/069160/022/03/10/019
B004/BOO7
AUTHORS: Kiselevo A.-Vag Pogoeyang T. A.
TITLE: The. Theory of.,the Corpusoular Structure of Xerogele.
1. The Preparation of Silica Gels From Large Globules.
With Varying Number .of Contacts and.-Their Investigation
by the Adsorption Kethod
PERIODICAL: KolloidVy shurnal, 1960, Vol. 22v No. 3, PP. 314 322
.TEXT: The theory of the~cdrpuscular structure of xerogels was developed
by A. V. Kiselev in Refe.'165- Accordftqfty, the skeleton of xerogels con-
gists of primary partiolesp which are-spherical in the case of silica
gelso The authors iLim at producing brines with particles of such a size
that their shape may,be determined by means of an electron microseopeg
and that their behavior in-the,process brine - hydrogel, - x9rogel, may.
be followed. The present paper desoribee the produ9tion of such brines
and gels and the investigation of their adsorption7lpropertioa. The
brines were prepared by exchanging the sodium ion for the hydrogen ions
.in solutions of sodium silicate by means of the KI-1 (KU-1) oation ex-
Card 1/ 4 -3

The Theory of the Corpus6ular Struoture.of S/069J60/022/03/10/019
Xerogels. 1. The Preparation of.,Silioa Gels B0041BOO7
Prom Large.Globules With Varying Nuaber of
Contacts and Their Investigation by the Adsorption Method
changer. kdescription in given of the formation of germs'in the silioic
aoid, solution stabilized,~y alkali_-by means of heatingg the addition of
fresh silioio aoid.. and the formation of hydrogel by a mmll addition
of HC1. The xerogels were obtained'by drying at 110-1200C. Fig. 1 shows
the methanol adoorption.on,eight xerogel samples which had been produce&
at various pffe The flWaleft, speoifio surface was found in the case of
xerogel obtainedat-pHo,10-7-90 that for the further experiments only
brines with PS~10-7 were used* For the purpose of avoiding a structural
change, the water was sublimated from the hydrogels in a vacuum accord-
ing to N. M. Kamakin (RI ef 12). Theng,the hydrogko were dried at
110-120000' The adsorption isothermal-lines for methanol- and benzene
vapors were determined by means of an apparatus with a quartz spring
scale (Fig. 2). The d Ni f this.apparatus had been begun byq
:e3d . 0 (TSP-4) hermo-
L. ff. Soboleva (decea Lr It--was located in a Mr-A
stat developed by G. G. Nuttik in the authors' labor-aVory. Fig, 3
shown the benzene-adsorption isothermal lines for four silioak%drogels
at 200C~ 15000, and for the xetogels produced therefrom at 150 Go The
Card 2/4 3

The Theo of the Corpusoular:Structure of 8/06~/60/022/03/10/09
Urogels. 1. The Prepirationof Silica Gels 3004/BO07
Prom Large Globules With-Varying Number of
Contacts and Their Investigation by-the Adsorption Method
specific ..surface* was determined by B, G., Aristov by means of nitrogen
.adsorption at low'temperatureso-A table contains these values as well as
the pore diameters and the number of contacts whiohy on the average, was
2-5. Fig, 4 shows thatithe specific sufface had not been changed by dry-
ing. Duxing transition from,hydrogel to xerogel merely a contraction of,
the pores occurs (Pig--5).- The iample6~obtained were homogeneounly,coarse-
Pored with &'particle diameter of about 300 1. The benzene-adsorption.
isothermal lines of silica gels are compared in Fig. 6 with those of
quartz and further4ith the data for KCK-2 (KSK-2) silica gel obtained
in the laboratory of the authors by Yu. A. Elltekov and D. P. Poshkus.
Results of measurement show good ag.reement. Only at-the stage of poly-
molecular adsorption,and capillary condensation does the influence
exerted by the paokings of different densities become notioalabla. Thera
are 6 figures, I tablev and 23 references: 18 Soviet and 5 English-
Card

LYGIM, V.I.; NOTALWA, LT.; UTSW21, K.L; KISIM. A.T.
Adsorption properties and infrared spectra of oxidized
carbon blacks. 11oll.shur. 2,2:-, no.3'..334-339 W-40 '60~
(KIRA 13:7)
I.. Institut nsichesimy khWi AN WM Kookm
(Carbon bl"k-Spectra) (AAsorption)

S/069/60/022/006/002/008
BO13/BO66
AUTHORS: Kiselev, A. V.i Korolev, A. Ya.p Petrova, R. S., and
Shcherbakrva-,K. D.
TITLE: Effect of the Degree of Chemical Modification of the Silica,
Surface.With Tetramethyl Chloro Silane on the AdBorption:of
Nitrogen- and Krypton Vapors
PERIODICAL: Kolloidnyy zhurnal, 1960, Vol. 22, No- 6, pp. 671-679
TEXT;. The authors of the present paper studied the effect of the silica
surface modification on-the adsorption of nitrogen- and krypton vapors.
They achieved a considerable-reduction of the interaction energy
adsorbate - adsorbent by substituting trimethyl silyl groups for the
hydrogen of the hydroxyl groups on the silicon dioxide surface. The
adsorption of nitrogen-, and krypton vapors was studied on five Aerosil
samples. Aerosil is a non-porous, highly disperse silica which was treated
with trimethyl chloro Bilane vapor of solution in benztne. -To obtain
samples modified as completel as possible, kerosil is hydrated for 19.5
L9C and 169 atm with water, and then treated
hours.in the autoclave at 350
Card 1/4

Effect of the Degree.of Chemical Modification S/069/60/022/006/002/008
of the Silica Surface With Tetramethyl Chloro B013/BO66
Silane on the Adsorption of Nitrogen-,and
Krypton Vapors
with ClSi(CH 3)3 This led to an up to.90% occupation of the Aerosil
surface with Si(CH ) groups. The adsorption isotherms of nitrogen and
3 3
krypton vapors were plotted attemperatures of liquid nitrogen. The
adsorption of. the two substances was found to be reduced by modifying
the silica surface with trimethyl silyl groups. The krypton adsorption
considerably decreases at a.high.degree of modification. Also the shape
of the adsorption isotherms varies i.e., they are less bent.-The isotherms
for the above vapors are plotted in coordinates of the BET equation. It
may be seen from it that owing to thereduction of the absolute adsorption
quantity the BET equation is.less satisfied, because with the less intense
interaction of adsorbate - adsorbentj the interaction of adso-ebate -
adsorbate must not be neglected any longer. The specific surface for
non-modified silica samples may be determined by the BET method, e.g.
on the basis of the nitrogen vapor adsorption. For modified samples,
however, the values obtained by the BET method are too low. It was found
that the adsorption of nitrogen- and krypton vapors depends on the degree
Card 2/4C

----------
Effect of ...the Degree of-Che.mical,Modification S/069 60/022/006/002/008
of the:Silic!~,Surface With Tdtramethyl Chloro, B01
3YB066
'Ni
Silaneon thi Adsorption of .,trogen-mand
Krypton Vapors
-that the BET methoft is not plicable
of modification to-such an extent ap
for determining the'specific surface of considerably modified sam'les.
p
The adsorption-isotherms obtained for the.nitrogen and krypton Vapors Tlere
compared with the isotherms previously obtained (Refs. 6,7,10) for vapors
of n-hexane, benzene,.methanol,.and water (Fig. 3). Modification was shown~
to effect a considerable reduction of adsorption in all adsorbents. I F.: 9. 4!
illustrates the approximat e.'o ours e -of. the adsorption decrease at
p/p -. O.I.-aith iner.easihg occupation 9 of the surface by Si(CH groups. 1.
s 3 3
V. P. Dreving is thanked for, developing a volumetric apparatus, and'
V
B. G. Aristov for plottingthe adsorption isot.herms of nitrogen. There.are,
4 figures, 3 tables, and 35 references:.22 Soviet, 5 Britisho 4 US,.-.and
3 German.
ASSOCIATION: Moskovskiy universitet im.' M. V. Lomonosova Khimicheskiy.
fakulltet,,Labo-ratoriya adsorbtsii (Moscow University imeni
I
V. Lo onoso Chemical Division, Adsorption Labor ry)
d. m v ato
3/0

S/07~J60/034/012/001/027
B02o/Bo67
kUTHORS: Poshkus, D. P. and Kiselev, L. V.
TITLE: Energy of Dispersion Interaction of Benzene and n-Hexane
With the Surface of Magnesium Hydroxide
PERIODICAL: Zhurnal fixiohookoy khimiip 1*' Vol- 34, No. 12,
2640-2645
TEXT: In a preceding paper (Ref. 1)p the authors assumed that the change
in the ratio between the adsorption heats of benzene and n-hexa 'ne vapors
on polar adsorbents is mainly due to the stronger electrostatic inter-
action of the benzene molecules as compared with the n-hexane molecules.
Thus, an electric field is generated above,the surface of the polar .
adsorbents, mainly above the lattioeLof Mg(OH) 2. Therefore, the author a
studied the energy of interaction forces between benzene and n-hexane
molecules and the Kg(OH)2 surface, Ug(OH)2 has a multi-layer,rhombohedral
ionic crystal lattice of the type CeI 20 Each lattice layer consists of an
Card 113

Energy of Dispersion Interaction of Benzene and S/07 60/034/012/001/027
n-Hexa'ne With the Surface of Magnesium Hydroxide B020YB067
Ug ion plane which lies between two hydroxyl ion planes which, in turn,.
consist.of oxygen and hydrogen ion planes. The potential of
iD
diapeirsion-interaction of the member i of the chain of hydrocarbon
.Molecules (CH CH and CH with the centers of force j of the
3' 2 arom
vg(60 lattice (H, 0, a*nd Mg) was calculated for three layers above the
2
basal~plane of Mg(OH)21 i.e., A) above the hydroxyl ion of the first.
(external) plane (layer k), 2) above the center of the hydroxyl-ion
triangle of the first plane, below.which lies the magnesium ion of the
second plane (layer B),, or 3)~the hydroxyl ion of the third plane
(layer C). When expanding the dispersion potential in a series, only the
first two terms are considered which repres'ent the potential of
dipole - dipole and the dipole - quadrupole interactions. The others
influence the entire poteatial only slightly. The constants of dispersion
interaction were calculat~id. The sums of the exponential functions
r-n , where n 6 and 8,1and J H, 0, or Mg 2+ . were calculated by
assuming that a 3.11 A, c - 4.73 A, u = 0.22, and that the distance
Card 2/3

Energy of Dispersion Interaction of Benzene and 5/076 60~034/012/001/027
n-Hexane With the Sur'faoe of.gagnesium Hydroxide B020YB06
betweenthe hydrogen and oxygen atom centers in the hydroxyl ion in
1 0-97 1- Summation was-performed up to r 10 A. Henoe, the great
OH ij
indrease in th' *.tio between-th adsorption heats of benzene and
Mg7or e
n-hexane,on compared to those of the vapors of these
H)2 as-
compounds on graphiie is not causedlay the dispersion interaction of
benzene and n-herahe molsoules with the basal plane of Mg(OH)'2 . Thire
are 3 figures, 5 tables, and 15 references% 6 Soviet, 2 US, 3 British,
and 4 German.
ASSOCIATION: Moskovskiy goeudarstvennyy universitet im. M. V. Lomonosova
(Moscow State University imeni M.,V. Lomonosov). Akademiya
nauk 'SSSR, Institut fizioheekoy khimii (Academy of Sciences
USSR, Institute of Physical Chemistry)
SUBMITTED: October 25t 1958
Card 3/3
R Ml-
t 14511 AMEN'
T-111
0

5/076j6O/O34/012/0012/027
B020/Bo67
AUTHORS: Poshkusp D. and Kiselev, 1. V.
TITLE: Electrostatic Field Above the Basal Plane of Magnesium
Hydroxide and Its Interaction With Benzene and a-Rexane
.Molecules
PERIODICAL: Zhurnal fizichoskoy khimiij 1960, Vol. 34, No* 12,
pp. 2646-2653
TEXT: In continuation of:the,calculation of the energies of.dispersion
interaotion~ of benzene: -and n-hox ano Moleoules with the Mg(OH)2 basalt
planeywhich was desoribed in the preceding paper (Ref. 1) the authors
studied the onergy.of electrostatic interaction of benzene and n-hexane
molecules with the electric field above the Mg(OH)2 basal plane They.
determined the voltag-e,component of the electric field F zover the
Mg(OH)2 basal planeas depending on 1) the dipole moment of the OH ions#
2) the degree of homeopolarity of the bond between magnesium ions and
Card 1/4

Electrostatic Field Above the-Basal Plane S/076/60/034/012/002/027
of Magnesium Hydroxide and Its Interaction With B020067
Benzene and a'-Hexane M61ecules
OH ions, 3) the distance.z between two layers above this plane, i.e.,,
a) over the OH ion and b).over the center of the triangle formed.by
the OH ions. The voltage of_the electric field over the basal plane of
P ions. (above the, infinite_'~ hexagonal lattice of the8e ions) Was Calcu-
lated by summingthe-individual charges in the plane of such a lattice to
a certain height.The'values-o.f F,,,/(E/a') above the infinite two-
dimensional hexagonal lattice ofAbe point oharges are given in Table 1.
Fig. 1 shows the diagram F_ /(F,/a ) as a function of z/a. The values F
V, 26
were determined from Fig. 1. Tables 2 and 3 give the calculated results
for the voltage of-the electric field above the two-dimensional, hexagonal
lattice of the dipoles p of the hydroxyl ions perpendicular to the lattice
plane, F - Fig. 2 shows the voltage.of the electric field F over the
ZP Z
basal plane~of Mg(OH)2 with z - 2.6 A. as a function of the dipole moment
p of the hydroxyl 'groups with two extreme states of the Mg(OH), lattice.
In Fig. 3 F. over the basal plane of the Mg(OH)2 lattice is graphically
Card 2/4

Electrostatic Field Above.thi Basal Plane 8/076/60/034/012/002/027
of Magnesium Hydroxide and Its.Interaotion With B02O/BO67
Benzene and n-Hexane Molecules
represented as a function,of.Ithe, degree of-bomeopolarity of the bonds
between Mg ions and, OH-ions*- As an example,Table 4 shows the contributions
of the negative charges and.the dipoles of the first and second OH-ion-
planes and the positive charges of the Mg-ion surfaces of the first basal
layer of Ug(OH) 2 to FZ above this layer,with z - 3.0 A and p - 2-4 D if
a pure ionic bond exists between Xg- and OH ions. The voltage of the
electric field above the basal plane depends only little on the homeo-
polarity of the ionic bonds Mg - OR whereas it.strongly depends on the
dipole moment of the OR ionsy above all *on the dipole moment of the OR
ions on the surface. With increasing dipole moment the.field voltage for
both layers changes almostlinearly. The voltage of the field above the
OR ions has the opposite sign and its absolute value is approximately
twice that of those above the-center of the triangle formed by the OR
ions. With increasing distance the electric field is gradually weakened.
The induction interaction of,benzene and n-hexane molecules with the
basal plane of magnesium hydroxide oannot be caused by-strong changes in
the ratio, of the absorption heats of benzene/n-heiane compared to that
Card 3/4

Electrostatic Field Above.the Basal Plane S/076/60/034/012/002/027
of Magnesium Hydroxide and Its Interaction With B02O/BO67
Benzene and n-Hexane Molecules
with graphite. These changes-are due to the strong electrostatic inter-
action of the constant multipoles.of the benzene molecules with-the
electric field.above the ]Kg(OH) basal plane. There are 4 figures, 4
1 2
tables,,and 10 references:, 7 Soviet, 2 British, and 1 Japanese.
ASSOCIATIOV: Institut:fisicheakoy khimii.Akademii nauk SSSR (institute
of Physical Chemistry of the Academy of Sciences USSR).
Hoskovskiy.gosudarstvennyy universitet im. M.V. Lomonosova
(Moscow State.University imeni M. V. Lomonosov)
SUBMITTED: October 259 1958
Card 4/4,

S/076j6O/O34/012/020/027
B020/B067
AUTHORs:. Isiriky&np le: is andjKiselsvj A. V,
TITLE: Adsorption Heats of Hydrocarbons on Magnesium Oxide
PE RIO DICAL: Zhurnal- fisichao'koy-khimii, 196o, Vol- 34, No. 12,
pp. 2817-2824
0 the complete values of the adsorption heate''of
TEXT.' In this pap r
n'heiane and benzene,on magnesium oxide are given, which in an earlier
Paper (Ref.*2)-had been-used for a comparison with the theoretically.
calculated'values, The measurement results of the isothermal lines ana.ths,
differential, heats of adsorption of the vapors on benzene, n-hexaneq and
fi-octanb on MgO are evaluated. The calorimetric determination of the heats.
bf adsorption was.made in an.apparatus described in Refs. 13 and 14, The
results are shown in Figs. 1-3. The adsorption of n-hexane and benzene
vapors was studied until the formation of approximately two adsorption
layers, whereas theadeorption.of n-octane vapors was studied almost until
saturation. This allowed the determination of the maximum desorption
,temperature near the saturation and the calculation of the distribution of
Card 1/)

Adsorption Heats of Hydrccarbons on. S10761601034101210201027
Magnesium Oxide 3020/B067
the pore volumee,from the desorption branch of the isotherm. When
determining theabsoluts val,us,~.of adsorption per,aurfaoe unit, the
specific surface s must be known whicht.in,turn, is determined from the
surface 00 that is-occupied by-the molecule adsorbed in the monomolecular
layer. By using the equationsof La Ingmuir, BET or other varieties the,
isothermail lines.'of adsorption.. can -be evaluated to determine the capacity
of the monolay r a orlthe energetic characteristics of the system
9 m
investigated. The values thus obtained are, however, often contradictory.
The constants of the-equations-BET and of HU"ttig for the isothermal lines
of adsorption of the benzenap-n-hexane, and n-octane vapors on MgO are
listed in Table 1. Table-2 gives-the values Wo for hydrocarbons, which
were calculated by various methods. Fig- 4 shows the heats of adsorption
of the benzene, n-hexane and n-octane vaporson MgO as depending on the
surface filling. Fig. 5-show,a the,differential entropies of adsorption
for the systems investigated.(standard state - normal liquid), and Fig. 6
gives a comparison of the isothermal lines of the dependence of the
adsorption heats and the adsorption on the relative vapor pressure of oc-,,
tane on coarse-pored MgO..There are 6 figures, 2 tables, and 27 references:
20 Soviet, 3-US, 3 British,.and 3 German.
Card 24
Z_ J

Y-j
lit?
IJ 3;
LP
lid
j 0 1 M
I
0- 9~r ~ 11 1
n .. 1 1 K:j
I .
FOR
0
co
t~ to all
a i -]Ills 4
92
Z
4:5
tP a
kip k

S/069/61/023/001/005/009
1424/B904
AUTHORS3 Isirikyin, A, As and Kiselev
TITLEs Effect of *ompression of carbon black on the isothermal line
and heat of adsorption of n-hexane
PERIODICALs Kolloidnyy Z~~nalp v. 23, no- 1, '19619 67-75
TEXTs The aim of the, present paper is an explanation of the nature of
inhomogeneities arising in,carbon black compressiong as well as of their
effeot upon the isothermal:line and heat of adsorption of vaporcus,hydro-
carbons. OePOH -6 (eforon-6) canal lampblack annealed in a hel Iium
atmosphere at 280001 as uned in the work under Refs 17P was used. as an ad-
sorbento This sample was/oompressed in a mechanical press at pressures
of up to 4 and up to 10 t =2. The-'resulting isothermal lines of adsorp-
tion are illustrated'in Figs. I and 2. Table i shows the speoifio sur-.
faces as determined from'the isothermal line of n-hexane adsorption by
the BET methodl the specific surface determined.by the authors agrees well
with published values. The limiting volume V of sorption (bulk volume
of the pores) decreases rapidly already at a relatively soft compression
Card 1/W
27

S/069/61/,023/001/005/009.
Effect of compression BI 24/B,204:
(4 V02), whereas it varies only slightly with further compress ion up to
2
10 t/om . The coordination number n displays the, same character (Table i),
The absolute isotherm al lines of adsorption and the curves of adsorption
heat obtained for the'range 0t monomoleoular filling and transition to
pol7molecular filling are shown in Fig. 2 (below) and Fig, 3. Table 2
presents.the standard-diffe,rential-thermodynamia characteristics of n-
hexane adsorption correspond .ing to a 50% filling of the monolayer
0-0*5 upon aferon-6 carbonIlaok (annealed at 170000 in a hydrogen stream)
and upon the carbon black samples of the authors* At 1700OCt channel was
graphitized only to a slight extent since the adsorption energy of n-
hexane during a heating of the carbon black to 28000C rose by 0.25 kcavmole,
whereas the adsorption entropy in the same case deoreased by 0-68 units of
entropy. For comparibonp .. Figa 3 shows also the curve of the differential
adsorption' heat of n-hexane.on P-33 (R-33) carbon black heated to.only
10000C. The arrows indicate the direction of the curve of differential
adsorption heat upon non-porous carbon black with a homogeneous surface
in the case of oompressiono Fig- 4 shows the heat difference in capillary
condensation of n-hexane"upon compressed and uncOMpreBsed carbon black
Card 2/M

s/o,69/61/023/00 2/002/008
B101/B208
AUTHORS: Kiselev, A. V. and Khrapova$ Ye. V.
TITLE: Approximate expression for the wave-like isotherms of nitroyn
adsorption on graphitized carbon black,-considering adsorbate-
adsorbate interaction in the.first-and second layers
PERTODICAL:~ Kolloidnyy zhurnal, v..23, no. 2, 1961, 163-169
TEXT: It was shown in previous papers (Ref. 1: Kolloidn. zh.,129:572,
19571 Ref. 2: ibid.p LO, 444, 1958) that the adsorption isotherm of vapors,
particularly of nitrogen, begins with a concave section owing to adsorbate-
adsorbate interaction. For the first section of the prevalent occupation of
the monolayert the following
equation is written;
9) (1 j while the~approximate equation
h G/K11(l - 9)(1 + K
)
.
h Q(1 - h) 2/K
GO - h)] (2) holds for the transi-
1 [1 - G(I - h)] [1 + K
n
1
tion to the adsorption of the second ljLyer. h denotes the relative pressure,
9 the total degree of surface occupation, K' the equilibrium constant for
th
b
t
t
t
t
t
th
l
e-adsorbah
e adsor
a
interac
for
ibrium constan
e
he equi
ion, and Kn
Card 1

S/d6g/61/023/002/002/008
Approximate expression B101/B208
adsorbate-adsorbate interaction. The authors studied the adsorption of
nitrogen vapor in a wide range of Q,and tried to obtain a better approxima-
tion-of equation (2) to the wave-like course of the adsorption isotherm.
Adsorption of N2 was performed at.-1950C on Soviet T-1 (T-1) carbon black
(annealed at 30000CI specific-surface s -:28.1 M2/g), afid T-2 (T-2) (32000C,
8 M 6.9 m2/g) by means of anapparatus.,*.Ltah has already been despribed by
the authors (Ref 15:- Izv-- AN SSSIR, Otd. khim. n., 1956P 390). Fig. 1 gives
the results and compares them with those obtained by 8- Ross, W. Winkler
(Ref. 3, see below), and S. Ross, W. W.'Pultz (Ref. 4, see below). The
waves of the isotherm of successive occupation of the black surface first
with the monomolecular nitrogen layer and then with the following layers
are given by G" am )/%, where. am - 10.2 5 pmole/m2'is the occupation
of the monomolecular layer; (a - a 2)/a. witha 2 - 18.0 Pmole/m 2 is the
occupation of the second layer. These parts of the isotherm are expressed
by Eq.(2) if for each part another value of the constants is taken. This is
shown in Fig. 4. The constants thus calculated are presented in Table 2.
Fig- 5 shows that agreement was brought about between calculation and
experimental data by substituting the various values for the constants of
Card 2/43

.. - - %2jr~ ~ .- -~, - . ~-- - , ..- ; ~ -. . I
I - ~, , _-,y ~ -, , - - -~- - -,,~ ~IWMINI

28280
S/069/61/023/005/005/006
B120101
AUTHORS: Kiselev, A. V., Kovaleva, N. V., Korolev, A. Ya.
TITLE: Adsorptive.properties of oxidized carbon blacks~
1. Oxidation of channel black in an aqueous medium
PERIODICAL: Kolloidnyy zhurnal, v. 23, no. 5. 1961, 582 591
TEXT: In this'paper, the adsorptive power of channel gas carbon black
samples from Ukhta with a specific surface of about 150 m2/g and an
oxygen content" of 4-06 which had been oxidized in aqueous solution
without heating with sodium hypochlorite, hydrogen peroxide, and a
mixture of HNO3 and H2S0 47 was investigated. The chemiso.rbed-oxygen
a,ontent, hydrophilic properties, and wettability of the carbon black
are increased by polar organic liquids. The carbon black.forms
highly disperse colloidal hydrosols without addition of organic wetting
agents. After drying and removing substances adsorbed on carbon black
by exhaustionat 150 C. the C and H conterts w3re determined by a
microanalytical technique, and the total oxygen content was established
Card 1/6 V(

2M0
5/069/61/023 005/005/006
Adsorptive'properties ofo.. B124/B101
from the difference. The presence of active oxygen was detected by
adsorption of NaOH from the aqueous solution and by determining the
content of hydroxyl or phenol groups according to Grignard. The
volatile substances content was,,determined by heating the carbon black
to 8200C. The nitrogen content in the carbon black samples treated
with the MTO - H so mixture was determined by the Kjeldahl technique,
3 2 4
and was found to be 0.27i~, The specific surface was calculated from
the adsorption isotherms of nitrogen vapor at the boiling point of
niti7o-en according to BET. Data on-the specific surface and the
chemical composition of carbon blacks oxidized by various techniques
are given in a table, The oxidation of the carbon black surface leads
to a reduced adsorption of n-hexane vapor. This is due to the fact .
that the oxidized surface is covered with oxygen-containing groups.so
tightly that there is no.more room available for the large n-hexane.
molecules. The increase in the adsorptive power for benzene vapor with
the oxidation degree of.the carbon black surface is due to the fact that
the interaction of thet-bonds in the benzene molecules with the OH
groups on the surface of oxidized carbon black samples is intensified.
The difference between oxidized and non-oxidized carbon black surfaces
Card 2/6

28280
B/069/61/023/005/005/008
Adsorptive properties of... B124/B101
becomes still more pronounced when methanol and water vapors (Fig. 2) are
adsorbed. Methanol is probably chemically sorbed, too. The carbon black
surface modified by graphitization or oxidation which becomes either
strongly hydrophobe or strongly hydrophilic, can change the adsorption of
water vapor by one or two orders of magnitude. Methanol vapor is most
strongly adsorbed on surfaces oxidized.with an HNO -H SO mixture,
3 2 4
although these samples contain less oxygen than samples oxidized ith
NaOC1; the same holds for.the,adsorption of water vapor. The.adsKption
of all vapors investigated generally increases with the degree of oxidation.
The authors thank,G.- M. Lyulina, N. N*Avgull, A. P. Arkhipova, L. I.
Doroshinaq and M. G. KuZ1mina for assistance. There are 5 figures, 1 table,
and 20 references,: 13 Soviet and 7 non-Soviet. The two most recent.
referencesto English-language'publication8 read.as follows: M. L. Stude-
baker, E. Hoffman# A. C,..Wolfe, L. G. Nabors, Industr. and Engng. Chem.
48, 162, 1956; J. V.. Hallum:,,H~ V.,Drushell, J. Phys. Chem. 61, 110, 1958-
ASSOCIATION: Institut fizichesko khimii AN SSSR, Gruppa khimii
poverknosti Moskva ~Institute of Physical Chemistry AS USSR,
Card 3/6 Group of Surface.Chemistry, Moscow)

B/076j6l/O35/002/601/015
Energy of~.'anteracti6n. adsiorbate B124/B202
the centers.~of b
car on.atoms he'external.basal plane; iij is the
dista.nceo'f the center i ~:fro M_: the center J_of the graphite lattice,
C e aozistants:.~of -the eleotroahemical attraction of type-
C
11 29. and C are, th
dipole d ip2e, d ipol e* PoI6 d'. quadrupole quadrupole,!and
quadru an
is,the 'constant~of -repulsion." _Cj- Iwas - calculated from the X
irkwood.Mliller
e
equation by means .of - the".polarizabilit
,y and the magnetic suse ptibility of
:the centers :~i and-.,J, C2 and C3 we' Iculated in the same w
re ca ay,,q *as
11Y
obtained from the.correeponding lattice~oonstants Q anMj, and, I ina 9
-equi ibr*ium o n 0,;
BI was obtained from the 1 o dition (Z ~z - (2j,
Z-Z
The potential of,the.interiietion.'-adoorbate adsorbate for no~~polar,
e e 0
molecul.es- fij' was det rmin d fr in the :e4uation
C
it Y, r,,4 + bij r7,n) 'PY
_2
2'-
wheie.ji is thej~otential of,the..-interaotion between two isolated~,-centeri
on was
and rii,the*distance of hes6 centers The oonstaht of iepulsi
e
'd teimined from the- e4uilibrium,condition at values of rii which
T
ard 2
C
A

02/661/015,
tn~ S/076J61/035/6
ii sotbate.
Energy of-_':interac on.ad B124/B202.
correspond o-a'.. egr our ac 0
t d eC of, 1 at:0 5, the ritpuleibn'-
-Ij
-of
.~~eziergy.in:jj~ may-- e-.neg ea. ed.. -._-_Tab16 -1 shows a comparison -the.
a oul6ted Value a and the~meae'ur ats of aas rpVion
edA iffeien tial he 0
0
'6bt'i ed*'-',When,st dsorotion of~`
i!L, 5 emeht;'as ud ing -the * AL
at. 9.0 GooUagre v a n
, q y
4,' complem'nonpolar mo n,'t I _11
e es o" he.;bas ,p ane o :-gr o tion
1 oul al* I f aphite the' idd rV
a of' their
energy was.-determined 9~,the:sum 6f th#~adsorption energies
individual. links A by taking:ao'count- *a f, 1he'differen' distances zi*~f the
-(z
different links ~i from'the plane rj z6) for the most favorabl6 surface
rie-- F , ':
0 ntIat ion~.~of -the.m .a ecule at*. n-al kanes with n,carb
s on at!6ms ih Ahe
molecul''
e
4
~n.
(D. 24Dc + (4-72) 4D,~H,~- 2 (McIll
-tq
olds from'whioh,:the' lat +.1.88n(kcal/mol6). SI
re ion In 0 .85 -
-alk,t
obtain
ed for-n-alkanes and.: '2 + 1.88n(kcal/m~.le "for
a4mono,dl
A
a-mofioolefines..,Table 2 compares:the calculated 'values of vita. the., -
0.
-a or 9 5
me sure v
a d :alues f 0. jor some isoalkanes,~oyolaijes, pd:
(f
j aromatic-hydrocirbons. -The. -authoi. also deals with the adsorption.of polar~,.`T4i
Card*3/A j~
U

~A
81016161103510021061'10151

Energy- f interaotion.adsorbate
. B124/D202 f
0
ae:, .
molec les' n ne.*-.of hite'.' Table 3 shows a comparison.of
u .0 tfie.:basal'pla' grap

calculated f or 0 1. - v~-O and Q`:_ 1 with the a:dsorption heats.
'the values.
eleotrokinetia- attraction aud the
enO
Yffien calculating --..(Io the
rgy 9f.
,
I
.
electrostatic inductive attractiofi"_

.2
6
Acopunt.',':
Table 4,shows a comparison of:the
r were taken into
,
,
i j- ii

,.' doo hea
a rp~tion: to. of water alcohols ammonia,
adsorptimenergy:ana, the
.
and methylamine. In this:oase both'the electrokinetio and the' electro-
f
static (inductive): interaction of.-:*,,the molecules with the carbon atoFs 0
-,~' the graphite lattice- and the Alfferent, degree ~ of their mutual '4asoctation " i i~'i
~~ at the expense of-the hydrogen bond vere.taken into account. in connection,il-
6r
with'the adsorption of nonpolar molecules. on ion crystals the~auth
red the calculated values of-potential adsorption energy~;--~ with
compa: Uoii.
e isoster (Table
measured in the calorimeter,and calculated from th
.- The aut~or.then discusses the-adsorption of n-hexane and of benzene.on
magneuium hydroxide and-th~.adsorption of.silicio acid and silicon dioxid
the''
69 'of the
Table 6
ds the
hift
ti
f
e
c
ill e. 4
.oso
a
-s
s
on
r
oompar
quen
y
a
hydroxyl groups. on. -the surface with the-differences o:e adsorpt! on*he t

9
' Card 4

S107616110351,002109-11015 -
rg. -on--
a
sorbi e... B124/B202:'
d
Y: ~of interaoti
-and':*
6ider* of the quantities. -A~ 'and
e
e!i
-A hor,also s
8 ativ -agr
_eemen
f! d di' cusses'ads
di e O,rPt ~on'on'
-chemic 11y*
. 4 rft 6- theoretica
.mo
a u
es. In
u 0 calculation,,of ith
::coAstant:th6' e
eq ilibrium'
Autho
j~ :the interaoti r.-first'determines the Potential curves of
-bent, and, -adsorbate - ads rbat
0 e.
on ad
-f - sorbate._~-. ad 0~~
ollowing.ho 6 lculA ed on'funofions of the system TI the
-the diitributi n
ddsorbe
-by e methods. -s n-
th 'of tat-i
adsorbate
stioal mechanics by using certairit
d
Ynam cal:models:.-in he :adsor~ti6n compi
ex- POIYani and D. PoAkus
ar mentioned. '.-,The -pr
ese
a resented at the Gordoz~ Conference
e n paper wa p
on
ce'Chemistry, _Meridan :(Ne .shire,
Surfa
are 18-figures USA), July 4, 1-966. ."There,
r-ef e~ e'
6 tables' and
r nces: 47 Soviet-bloolAnd 310
.77
non-Soviet- 10c; E. L
em. 64:. 961- 1960.:-'
b -Pace' A. J. Phys. Ch
R. ~,S
'ASSOCIATION:
Akad miya nauk SSSRI~ Izi'titut fizicheakoy khimi' .(Ac~Ademy of.
e
Sciences USSR$- Institute of Physical ChemiE
Itry):; Moiiovskiy.
gosudarstvennyy universitet im. m. V. Lomonosov
Xhimicheskiy fak-ul:1 te
t '(Moscow State Universit imerti M.
Lomonosov--Divisi
ofi~of_~Chemistr
y
Card 5/9

MELEV, A.V.
Gordon conference on interfacial chemistry in the U.oSoA* held
on Tuly 164, 1960. Zhu. fiz. khim, 35 no,2:1+76-477 F 16le-
(mm 16:7)
(Swface ahemistry-"Congresses)

B/076/61/035/008/016/016
B110/B301
AUTHORSt Vasillyeva, V. A. V., Nikitin, Yu. S.,
Petrova, R. S., and Shcherbakovap K. D.
TITLE t Graphitized carbon black as adsorbent in gas chromatography
PERIODICALs Zhurnal fizicheskoy khimii, v. 35, no, 8 19619 1889 1891
TEXTt In the work under consideration, the authors made use of
geometrically and ohemically,modified silica gel as the carrier of another.
solid body. Thermal types of carbon black annealed at r4 30000C are' high-
disperse bodies with a very homogeneous surface. Their.absolute adsorp-
tion values are much greater than those of other adsorbents. Tablets are
difficult to produce without binding agents. Therefore, the carbon black,
is introduced into the large pores of the solid carrier. Thus, a powdery
adsorbent,with homogeneous surface may be introduced into the column. The
carrier should be a large-porous body with thermally and chemically stable
and very poorly adsorbing surface. In the present case, the authors used
large-porous silica gel with a very small surface covered by chemically
grafted trimethyl silyl-groups. A 2-hr hydrothermal treatment in the
Card 116

S/076/61/035/000/016/016
Graphitized carbon black..,. B110/B.101
autbalave,at 35000 reduced the silica gel-surface to 15 m'/g; the
enlargement of skeleton globules and pores was established by electron
microscopy. Purther grafts of trimethyl silyl groups an the silica gel
sitiftoe according to I. V. Borisenko led to a sharp decrease of adsorption.
AM% blown out and sieved graphitized thermal carbon black T-1 (T-1)
.000000) was then introduced into the porea. The silica gel was thereupon
introduced into the column ohromatographp where it was heated for 2 hr in
the nitrogen flow at 15000. Graph a) in the figure shows chromatograms
of vapor, mixtures of benzen4p, acetone, and-.n-hexane on geometrically
modified silica gel with hydr6,ts&-, surface; d) shows chromatograms of these
three individual vapors on sifica, gel modified with trimethyl silyl groups;
and 6) chromatograms of the mixture on silica gel modified with carbon
black at different temperatures. The succession of peaks was, however,
the inverse compared with silica gel with hydrated surface. The acetone
peak ha.d a pronounced tail due to reaction between carbonyl groups and
accessible hydroxyl groups of the 1ilica, gel crarrier. The form of benzene-
,and n-hexane peaks corresponds to the form'of'ourves illustrating the I
adsorption heats as functions of the form.of'idsorption isotherms. The
peaks become narrower at.higher temperatures. According to theory, the
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Graphitized carbon black... B110Y3101
ratio between band width and-retardation time is conserved. A study of
chromatograms of individual benzene.and hexane vapors at five temperatures
allowed estimating their adsorption heats on carbon black from the
dependence of logarithm of relardation time versus inverse temperature;
results were consistent with calorimetric data. The combination described
is.well suited for gas chromatography as well as for a rapid physico-
chemical analysis of the utilized powders.alike. Silica gels_modified in
this way can also serve as carriers bf,steady liquid phases. There are
1_figure and 6 referencess 3 Soviet-bloc and 3 non-Soviet-bloc. The two
references to English-language publications read as follows: Ref. 31
J. Bohemen, Stanley H-. Langer, R. H., Perett, J. H. Purnell, J. Chem. Boo.,
24441 196o. Ref- 51 F.- T. Eggertsen, H. S. Knight, S. Groennings, Analyto
Chem. , L8-, 3.03, 1.956.
ASSOCIATIONt Laboratoriya--.adeorptsii i gazovoy khromatografii khimicheskogo
fakulfteta Moskovskogo gosudarstvennogo universiteta im.
M. V. Lomonosova (Laboratory for Adsorption and Gas
Chromatographi.of...,t4p-C,hemistry Division of Moscow State
University imeni M. T'.*,Lomonosov)
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8/020/61/136/002/025/034
B004/BO56
AUTHORSt Babkint I.Yu. Kiselev A V and Korolev, A.Ya.
TITLEt Adsorption Heats-and:-Entropies of Hexane and Benzene
Vapors-on an'-Aerosilalith a Surface Modified by
Trimetb u
ylsilyl Gro p9
PERIODICALs Doklady Akademii naukSSSR, 1961, Vol-136, No.20 PP*373 376~
TEXT: The authors studied-the adsorption of hydrocarbon vapors on the.sur-
face of.aerosils, which had been treated with trimethylahlorosilane. A
theoretical calculation of the adsorption energy of n-hexane and benzene
molecules (Ref, 3) resulted, with increasing'modification of the silicon
dioxide, in a drop of the.adsoption energy below the value of condensation
heat. It was assumed that in the case of sufficiently modified aerosil, the
adsorption heat of these hyArocarbona.must become negative. It.was the.pur-
pose of the present work'to check this assumption. In order to give the
aerosil surface greater homogeneity and reactivity with respect to tri-
mathylohlorosilane', a hydrothermal treatment in an autoolave was carried'
Card 1A

Adsprption Heats,andzEntropies of Hexane and S/020/61/136/002/025/034
Benzene Vapors on .an Aerosils With a Sur- B004/Bo56
face Modified by Trimethylsilyl Groups
out..at 120 265 C for 8 19. 5 -hours. Specimens of aerosils were obtained,
whose surface was ocoupied'by Si (OR ) groups degree of occupation:
0, 60, 85 90, or 100%. For these spMmens' Fig. I shows the calorimetric
differential adsorption.heat., qs~_ (kcal/mo-le)asa function of adsorption
,*_Molelm2), and,Pig. 2~ahows the isothermal lines fore/, as a- function
of the relative vapor pressure 13/p The dropping of q a below the conden-
sation heat L was observed,..and for~the completely 000%) modified ape-
cimen, the true adsorption.heat was found to bet q a - L - -0-5 with n-
.hexane; Q - L 1.0 w.ith,benzene.,
.s.
Accordingly,.adsorption decreases considerably with ~ constantly rising
modification (Fig. 2). In the oase-of large p/p , the surface is occupied
8
with hydrocarbon molecules- to such a small content that capillary conden-
sation may ocour in between-The adsorption heats measured thus include
the heat of capillary condensation, and the true adsorption heats must
be still lower. From the adsorption isothermal lines and the adsorption
heats, the differential adsorption entropies for n-hexane and benzene
Card 2/w.