SCIENTIFIC ABSTRACT LEYTMAN, M. B. - LEYTMAN, YA. I.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R000929730002-9
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 43
• Document Creation Date: January 3, 2017
• Document Release Date: July 31, 2000
• Sequence Number: 2
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT


ENCL.- 00

--~,OTHM: 00V

, LEYTMAN, M. B. -
....... --
Multichannel digital counting device. Izv.vys.ucheb.zav.; prib.
6 no.6:29-36 163. (MIRA 17:3)
1. Azerbaydzhanskiy institut nefti i kbimii imeni Azizbekova.
Rekomendovanu kafedroy eloktricheskikh izmereniy i vychislitellnoy
tekhniki.

---77
(3006226, 144 000100810982109
A TrMCM T.Am,+tnan ~M ~n

S/0146/64/007/001/00,1410031
ACCESSION NR: AP4018993
f AUTHOR: Melik-Sh-khmazarovp A. M.; Leytrnan, M. B.
-TITLE: Autocompensated pulse-time voltage converter
SOURCE: IVUZ. Priborostroyeniye, Y. 7, no. 1, 1964, 24-31
TOPIC TAGS: pulse time converter, analog to digital converter,
autocompensated pulse time converter, voltage pulse time converter,
transistorized pulse time converter, telemeter, telemetering
ABSTRACT: Conventional'pulse -time converters have complicated precise
voltage -generating circuits and require amplification of the primary -detector
! voltage. A new converter circuit (see Enclosure 1) is proposed which obviates,
to a degree, the above shortcomings by using a self -compensation principle. A
transistorized tensometer -bridge -voltage converter, for 2 mv numimum, was
built and tested. Its output characteristic -was found to be linear within 0. 1%.
6rd

ACCESSION NR: AP4018993
A variation of 0 -2 mv of the tensometer -bridge voltage caused a pulse -duration
-3
variation of from 4x 10 to 15x 10 ' sec. The output-pulse duration varied
within2: 0. 101c for a supply-yoltage variation within1 10%. The device is recom
-pulse telemeter systems and for analog -to -digital conv
mended for short erters.
The no-preamplifier feature is regarded an a 'great advantage of the device.
Orig. art. has: 5 figures and 10 formtAas..
ASSOCIATION: Azerbaydzhanskiy institut nefti i khin-Ai im. M. Azizbekova
(Azerbaidzhan Institute of Petroleum and Chemistry)
SUBMITTED: 173an63 DATE ACQ: 23Mar64 ENCL: 0 1
SUB CODE: GE NO REIF SOV: 005 OTHER: 000
Card

-LEYTMAN Kikhail Borisovich aspirant
I.- ,, I - f
Autocompensating frequency converter. Izv. vys. viciinb. zav.;
elektromakh. 7 no.5:612-615 164. (%M-TRA 17:9)
1. Azerbaydzhanskiy institut nefti i khimii.

LNMAN, M.B.; NTHLAMI!, R.Ka.
Rase-length modulator for telpmetering s7ster,5o Iz-ir. vys,
ucheb. zav.-,neft' i gaz. 6 no. 5:97-102 163 (141RA IT27)
1. Azerbaydzhanskiy Institut nefti i khim:ti imeni M, Azdzbekova.

iACCESSION NR: AP4039389 S/0144/64/000/005/0612/0615
~.AUTHOR: Leytman, Mikhail. Borisovicho(Aspirant)
!TITLE: Self-compensating frequency converter
~SOURCE: IVUZ. Elaktromakhanika, no. 5, 1964, 612-615
ITOPIC TAGS% frequency converter, converter, self compensating
;frequency converter, frequency meter, frequency conversion
!ABSTRACT: A s,lf-compensating frequency converter, whose block
,diagram is shown in Fig. I of the Enclosure, converts frequency
'by virtually any factor. In this converter the factor does not
~dupend on the gain of the preliminary amplifier or the frequency
I
,characteristics of the oscillator 4 and the frequency f, of the master
z
:oscillator. The input voltage with frequency f,, which is subject to
iconversion,is applied to the input of frequency meter 1. whose mean
,output voltage u ia proportional to the measured frequency.
After
~smoothing by means of filter 2, voltage a is applied to a comparison
Card 1/3

1ACCESSION NR: AP4039389
circuit where it,is compared with voltage uk coming from the feedbacki
circuit. The difference Au between these two voltages is amplified
!
:by amplifier 3, whose output voltage regulates the frequency of
Joscillator 4. The voltage at the output of this oscillator with a
;frequency f is the output voltage of
2 the converter. This voltage is
.transmitted to the feedback circuit consisting of frequency meter 5
and filter 6. The conversion factor of the d(,:scribed oonverter
~is 1000. When fL varies 20-50 cpso it chang&s by not more than
tO.1% of the rated value. 'With a sudden variation in voltage u, the
transient time for the output frequency does not exceed 3-4 msec.e,
rig. art. hass 2 figur s and 3 formulas.
i0 /*
ASSOCIATION: none

MELIK-SHAKHNAZAROV, A.M.; LEYTMAN, M.B.
Auto-compensating pulse-time voltage converter. Izv VYB,
ucheb. zav.j prib. 7 no.b24-31 164. WRA 1719)
1. Azerbaydzhanskiy institut nefti i khimii imeni Azizbekova.
Rekomendavana kafedroy elektricheskikh izmereniy i vychislitellnoy
tekhniki.

i 1-)~Mh-hh-
-AZr1W,-XP50 0Y 000/ 9[000
2895 SOURCE CODE: URIM9764/ T 0008
AUTHOR:-.Leytn-tan, M. B. (Engineer)
ORG: none
TITLE; Transistorized ~uloe-duratio modulator
SOURCE: Priborootiroyeniye, no. 9, 1964, 7-8
TOPIC TAGS; modiflato.r, pulse duration modulator
ABSTRACT: A transistorized pulse-duration modulator is described which is based
on a slave multivibrator circuit (see fig.). One
arm (transistor T, and resistor R, ) is supplied by
the input voltage Uj, . Normally, T, is non-
conducting and T. is conducting and saturated.
Starting positive pulse U turns off T,, and deprive
the.,circuit of its stability. Time duration t of the
unstable state (when U0j' is negative) depends on
J.C. the C, recharge time (from U-,,, -U, to -U, ). With
JL -U, applied, T.. becomes conducting again, and
Principal circuit of the modulator the circuit returns to normal. Hence, by varying
Card I/!,-' UDC: 6m-376.s;6z1.38Z.3

--ACC NR:--A-PS028957-------
UJ,, , it is possible to adjust time t of the output negative pulse. Formulas for
calculating this type of modulator are presented. An experimental verification is
cla.imed to have'- shown that: M The characteristic t a f(U,,,) is linear; (2) A pulse-
duration range of 10000 is obtainable with the input voltage between 0 and 2. 6 v and
a starting-pul-se duration of 2 microse c.- (3) An error of A or less occurs for
temperature variation, within 0 + 40C. Orig. art. has: 3 figures an.! 14 formulae.
SUB CODE-: 09 /'SUBM.DATV; none
IWA)
2 j,~.
t~j4 2/

SOURCE CODE:
AUTHOR: Leytman, M. B.
UR 00 000/0147/0155
ORG: none
TITLE: Magnetic -element transducers for telemetering 7quipment
SOURCE, Vsesovuznove soveshchanive Do maanitnvm elementam avtomatiki I
chislitell __2th, Yerevan
no tekhniki. 1963. Magnitnyye ts1frovyye elementy
(Magnetic digital elements); doklady soveshchaniya. Moscow, Izd-vo Nauka, 1965,
147-155
TOPIC TAGS: telemetry equipment, magnetic
element, magnetic transducer
ABSTRACT: Two magnetic transducers are described.
A transformer -type transducer of voltage into pulse
duration (see Figure 1) 1& actually a trigger circuit with
a single stable state and transformer feedback. A short
starting pulse turns on the transistor and a feedback
voltage appears In the base circuit which acts cumula-
tively with Ui,. At a certain U,.,, value, its sum with
the feedback voltage exceeds the blaa, and the
Card 112.
:-Ec
W1
W,
W
W
F1
NW,
'An'+f_
Start
Fig. 1. Voltage -to-pulse-
duration transducer

L 39489-66
ACC NRs AT6002983
70
transistor will also be conducting after cessation of the -------- _E
C
starting pulse. Some experimental data is reported. A
transformer -type transducer of frequency into (mean)
4
voltage (see Figure 2) is actually a trigger device with a
positive feedback; the relation between input frequency
and output voltage is linear. The mean output voltage
fl
depends on the input frequency, saturation induction of Start
the core, and is theoretically independent of the supply UOUt
voltage. In practice, only a rough voltage stabilize r
proved to be necessary. The duty factor of output d-c Fig. 2. Frequency-to~
pulses may be made close to 1. An experimental voltage transducer
80-cps-ma-,dmum model exhibited an error of 0. 1% with
a voltage increase of 2516. The error was 0, 5% with a temperature variation of
20-45C and could be reduced to 0. 1% by temperature compensation, Or1g# art. has:
8 figures, 22 formulas, and I table.
SU33 CODE: 09 SUBM DATE: 23Apr65 oRiG REF% Ooz
Card 212MV/117

ACq NR, -AP-6022200 SOURCE CODE: UR/0115/66/000/005/0036/0036
AUTHOR: Leytmang M. B.; Pakhlavuni, R. K.
ORG: none
TITLE: Transistorized high-voltage A stabilizer
SOURCE: Izmeritalgnaya tekhnika, no- 5, 1966, 36
.TOPIC TAGS: voltage stabilizer, transistorized circuit
ABSTRACT: The new device comprises a low-voltaA2 dc stabilizer, a transistorized
de-ac step-up inverter,, a h-v rectifier, and a feedback circuit the rectifier
to the 1-v stabilizer. The stabilizer has a compensation circuit with a d-c amplifier,
k,principal circuit of a 120-v 200-w stabilizer is shown; its supply voltage,
220 vt10%; stabilization factor with respect to the supply voltage, 1000; internal
resistance, 0.15 ohm. Principal components are specified, and their operation
explained. The stabilizer has automatic protection from inverter failure and
overloads. Orig. art. has: 1 figure. [031
SUP, CODE: 09 / SUBM DATE: none / CRIG REF: 003

89921
s/191/6i/M0/002/011/012
312h/B20h
AUTHORS: Arkhipova, Z. V., Serrenova, A. S., Paranjorl-ov, Ye. Ya.,
Halivaylko, Ye. I., Lp;al-lan, 71, 1.
TITLE: Determination of the solubility of polyethylene in hydro-
carbons and of the dynamic viscosity of the solutions
obtained
P-rRIODICAL: Plasticheskiye jaassy, no. 2, 1961, 61-65
TM : It was the purpose of the Present paper to investigate the solubility
of polyethylene in various solve-1-:ts, the dependence of the solution tempera-
ture of polyethylene on its molecular weight and the concen'ration of the
solution, as well as to -Rasure the dynamic Viscosity Of thL Solutions
obtained ad their filtering velocity. The solubility of Polyethylene was
determined from the turbidity of a solution of given concentration during
observation in transmitted light by maeans of the device, developed by
V. 111. Dyn'ko, whose schematical drawinZ is shown in Fig. 1. The polpxr
iieighed portion ij~ conveyed into the steel container 1 and, after the
Card 113

89921
S119 1/6 1/000/00, 2/0 11/0 12
Determination of the solubility... B12h/B20h
addition of a 1,~ieasured quantity of solvent$ the lid, which is scaled by
fluoroplast~ is closed. The tightness of the apparatus was chocked with
the gas valve closed by increasir*, the nitrogen pressure to 7-8 atmospheres
excess pressure. From an ultrathermostat, the heat-trans.-Atting ne-dimm is
conveyed into jacket 9, the valve is partly opened, and the solvent and the
polymer are mixed by i-.qeans of bubbling-through 112. The temperature was
measured by 'means of a thernocouple, which was connected with a portable
potentiometer; the measuring accuracy was AO-50C. The light from lamp 10
passed quartz windows 7 and incided upon the mirror 8 from which it was
reflected. The solution obtained was 20-250C above solution temperature;
when the solution was cooled, a distinct turbidity occurred, which continued
.to increase with dropping teciaperature. The temperature at which the first
slight turbidity occurred was taken as solution temperature. The dynamic
viscosity of the polymer solutions was measured by means of the Heller
viscosimeter from formula W=T'I,ds -dsol).'Lg%', there is the viscosity,
the time of the fall of the sp,i,--re, ds the density of the sphere, dsol the
Card 2/3

89921
S/l9l/6l/0f)0/002/,-)ll/0l2
Determination of the solubility... B124/B20L
density of the solution, and K the constant of the sj~here. The masuring
error is 3%. The density of polyethylene was determined in the laboratory
of B. I. Sazhin. The solution temp-ratures of polyethylene, obtained by
means of Cr03-catalysts, in various solvents are given in Table 1. With an
increase of temperature, the solution time of polyethylene in hydrocarloons
decreases, and when polyethylene concentration in the solution is changed,
also the temperature of the quantitative dissolution changes (Table 2).
Hith increasing molecular weight of polyethylene, its solution temperature
increases linearly with intrinsic viscosity. The temperture dependence
of the concentration of low-molecular polyethylene which remains in solu-
tion when cooled, is shown by Fig. h, the dependence of the dynamic viscosity
of the nolyethylene solutions in synthol on the intrinsic viscosity is shown
by Fig. 5. Professor Ye. V. Kuvshinskiy is thanked. There are 9 fi,gUres,
2 tables and 3 references: 2 Soviet-bloc and I non-Soviet-bloc.
Card 313

LRYTHAN, M-Z.; ROGOVA, L.I.
Reebarch on effective methods for treating children with a chronic
form of dysentery and unsteble stools, Topokrasyspate noo4:7-12 154.
(DYUVMY) (MLRA 9:12)
(INUSTims-BuTiRioLmy)
(qumucRim)

BOTADYRXV, T.Ye.; ALXSANYAN, A.S; SHATROV. I.1.; rORSHAKOVA, A.S.; LMMAN,
M.Z.;,-_?rROLOV, V.I.; KOVALEVA, R.I.
Studies on the effectiveness of an alcoholic dysentery vaccine based
upon extensive epidemiological observations. Zhur.mikrobiol.epid. I
immun. 30 no.7:3-7 JI '59. (KIRA 12: 11)
1. Iz Institute, epidemiologii i mikrobiologii imeni Gamalei AMN SSSR.
(DYSENTERT, BACILLARY - immunology)
(VACCINES)

LEMAN M Z kand.moditsinskikh nauk
Clinical and epidemiological peculiarities of coccidiosis in com-
bination vith chronic dysentery in children. Med. zhur. Uzb. no.St
37-40 Ag 160. (KMA 13:9)
1. Iz Tashkentskogo nauchno-isoledovatellskogo instituta vaktsin i
syvorotok (direktor - A.B. Inogamov).
(LIZBEKISTAN-COCCIDIOSIS) (DYSFATTERY)

LEYTHAN, M.Z.; SLAVINA, A.M.; ZHDANOVA, L.D.; ABDUSAMATOV, M.A.
Effectiveness of antibiotics in inactivating experimental bacterial
carriage in rabbits. Zhur.mi obiol., epid. i immun. 32 no.10:57-
58 0 161. 04LU 14: 10)
1. Iz Tashkentskogo instituta vaktsin i syvorotok.
(ANTIBIOTICS) (BACTERIA, PATHOGENIC)

KE&YFETS, L.B.; KHAZANOV, M.L., UYTI-M) M.Z.; HZIMINOVA, K.L.; SLAVIRAY Khjl.;
VASILIYEVAp A.V., 1,ULAfkVTTPI-.S-.--
Typhoid-paratyphoid-tetanus chemically sorbed vaccine. (Exp~~-:Lnental
study, reactogenic properties, epidemiological effectiveness). Zhur.
mi obiol., epid. i immun. 32 no.9:1E~-25 S 161. (14I'LA 15:2)
1. Iz Moskovskogo instituta vakts.-;n i syvorotok imeni Mechnikova,
Tashkentskogo instituta vaktsin i syvorotok, Turkmenskogo instituta
epidemiologii i gigiyeny i Kazakhfikogo instituta apidemiologii,
mikrobiologii-i * iyeny,
(TYPH911B FLWO (FAiLATYPHOID FLW:R)
(TETOUS) (VACCRES)

LEYTMAN M.Z., kand.med.nauk, starshiy nauchnyy sotrudnik; DOLINSKAYA, K.N.,
do sent,.-k,9nd.med.nauk
Effect of sensibilization on tki~ morphology of amebiasis in
experimental animals. Trudy TashNIIVS 6:217-226 161.
(MIRA 15:11)
1. Tashkent-skiy institut vaktain i syvorotok (for Leytman).
2. Kafedra--patologicheskoy anatomii TashkerstAkogo gosudarstvennogo
meditsinskcigo inatituta (for Dolinskaya~
(AMEBIASIS) (DYSENTERY)

--j!g[TMAN M.Z.; KUVMINOVAp M.L.; SIAVINA, Kh.M.
Study of the immunological effectiveness of the typhoid component
of polyvaccine from the Scientific Research and Experimental
Serological Institute. Trudy Tash1IIVS 6:245-250 161.
(MIRA 15:11)
(TYPHOID FEVER-PREVENTIVE~ INOCUIATION)

p M.&j- SLAVINA, Xh.M.; ZHDANOVA, L.D.; PLMKVAp O.G.
;6
Data on early laboratory diagnosis of abdominal typhus under
polyclinical conditions. Nauch.trudy uch.i prak.vrach.Uzbe
no.3:134-139 162. (MIRA 16:2)
(UZBEKISTAN-TYPHOID FEM)

p V.B.; KUZIMINOVA, M.L.; SLAVIVA, Kh.M.;
MOKMVA, A.D.; BOGACIMVA, R.I.; GINZBURG,G.M.;
GOTGIL'Fq M.Mq SMIRNOVA, T.T.
Study of the effectiveness of subcutaneous immunization
against dysentery with Che:rmokhvostov's alcohol vaccine.
Trudy Tash. WIIVB 5:59-71262. (MIRA 16:10)
(DYSENTERY -PREM;TIVE INOGUIATION)

IstIm", M. Z.
Clinicai, and epidemiological characteristics of amebiasis and
amebo-bacterial dysentery. Trudy Tash. IIIM 5:105-117162.
(MIM 16210)
(AMEBIASIS
-MEYFETS,v L*Be; JJDMM
kz
, !;_ KMoMINOVA, M*L.; SAIMIN, L.V.;
SLAVINA# A.M.;-"tfbAkOVA, L#D*; PIETNEVA, O.G*; KOYENM,, LJ
G'NZBURG,l GA; VARSANOVA, YO.Yaol MZLIHIKj YONYU0
Studies on the epidemiological effectiveness of alcohol
corpuscular and chemical sorbed typhoid and paratyphoid
fever vaccines. Zhur. mikrobiol., epid. i i=mn. 33 no.7:
53-59 JI 162. (MIRA 17:1)
1. Iz Moakovskogo instituta vaktain i-syvorotok imeni
Mechnikova i Tashkentskogo institute. vaktain i syvorotok.

7~- ~-
.1 FF747
R
KAYFETS, L.B.; SALMIN., L.V.,- LBYTMAN, M.Z.; KUZIMINOVA, M.L.;
IIASIL'YEVA, A.V.; GAL~ NA, A.M.; ZHDANOVAP L.D.
TLETNEVA, o.r,.;- VARSANOVA, Ye.Ya.; GINZBURG, G.M.; GLYAZER, N.G.;
NELINIK, Ye.yu'.
Comparative evaluation of typhoid fever vaccine prepared by various
methods, materials from an epidemiological experiment in 1961.
Zhur. miltr6biol., epid. i imm. 41 no. 2-.70-76 F 164.
(MA 17:9)
1. Moskovskiy institut vaktsin-i syvorotok imen.i. Machi-dkova,
Tashkentskiy institut vaktsin t syvorotok i Ashkhabadskiy
institut epidemiologii, mikrobiologii i gigiyeny.

XMIFETS
j. L.B.; SAIMIN, L.V.; VASILIMA
A.V,.; SIAVINA, A., 'F-7W41 M-Z-; KM 'MINOVA, M.L.;
MO; IEVINAp L.A.; primmali ucbastiye:
PAVLOVAY Te.A.; ANTOKOVA, A.A.; PLETNEVA, O.G.;ABDZUATOV,
GALIPERIN, I.P.; RDMOVA,, T.K.; ADUWA, N.I.
amparative evaluation of the reactogenicity and effectiveness of
vaccines intended for the Prevention of typhoid fever ",I par,
typhoid fever B; bRsic materials of the epideiniological experiment
in 1962. Zhuro Aikrobiol., epid. i immun. 42 no.7:58-64 ii 165.
(MIRA 18:11)
1. MoskovEU-y institut vaktsin i Byvcrotok imeni Mechnikova
(for Favlovap Antonm). 2. Tashkent kiy institut vaktsin i
xMrotak (for Pletnevap Abd:usamaz:Vr10)* 3a Ashkhabadskiy institut
ePidexiologii, milwobiologii i gigiyeny'(for Gallperin., Nemtsova),
4. Garlkavskiy institut epidemiclogii, mikrobiologii I gigiyany
(for Aduyeva).
V*S., oriiInator; Lv*m"-. assistent.
mim, -A.A..professor; ITAXOT
28
arias In confectionery workers. stomatologiia, no.3- 49-
Dental a ' (KUM 7:6
*-is 1541o ekoy stomatologii (sevo prof, Yeje.Pla,
l' Iz kafedry terapeTticho . A.A.Minkh) Moskovskogo medl-
t;nov) I kafedry gigieny (zave prof'(dir. dotsent G.N.Beletakir)
tainsko 0 stomatologicheakogo in5ituta
miss.# spidemiolOgTir
*in confectionery workers)

11 0 6 1 1 v 10 11 1.- It IS 44 Ifu III a n If A it 17 Al 10-11-9t- 1i- A-D -14 V 0 AO #1 U L
9 ~A ~1 t 4ItI I I AJ, -A AA U a W U
A -Y I ~A,+ j.
_E -IL.
a 4_6 -- - I -_ - ~ ~ - - - - -_ - I __1 - - ____ -0
00 A 11 fw W sulysle of wdwcai uwtm _09
Trudy LKKk 7 11939, b
I(VJ44). V !tft 7" so
ar. I
00 -igw of ubtlag ingtaloft for tu "'Ay'"s of trinitto-P.
llyivac md skIWA-wiva. al For the &In.
of "ityly, on," "Calsdal mainly of the di- am 04 tri.
nkm d"#M at 0-Flaus, sad elitylbeasenc, dry at NY.
09 W06 10 1. an a Gawk fater Orst with txx water (0.73,11.), -00
th" wkb ak- to mom the od drow. The decrease in
010 wt. al the ="m tim the coutect of "xylyl oil." lathe
00 r predlect fiva am) det. the temp. of the beginning of 1:00
UK Mon. and the catatk temp. JU congtrits 01 tri.
ult-0-20014 SW UWUD-M-XYICN am found from the
00
to" diagrain of the binary mists. cd thew suL*tmxv,. 400
The CODUrit Of the ni" derivs. of ethylbenum is detd.
00 j by the AMIC method. Hot 10 g, of jampie on a water coo
bath with LW-30 cc. of a 6% ada. ol Nsks%, jutcg the
0 got
insal- rellidlist CM"W U14JsJY 01 Is Milt. of the nitro d.-
00 rivs. of etbylbenum wW trinitro-0-ityletic, dry the residur
and
00 S deL the couttat of the nitro derivs. of ethylbrume 2 see
from the loas of wt. W. R. Hems
00 ki
Wi
A0
0
b*0
too
A M.ILA AITALLfiNGICAL LITERATCOM COMOICAT411 19--
C--r -flu ~i 1. V lid 0 84 9 a a I I W
U SAW 00
0 P, l, 0 1, of At a it IV a PI It is is of luo lk 1 1(4 it
4 0:0 0 0 0 0 0 0 0 - 0 * 0 0 0,0 6 0 0 0
0 9~0 0 0 a 0 It 0 0 IP 0 0 0 0 0 0

AUTHORS: Pevzner, M. S. SOY/75-113-4-21/29
TITLE: The Determination of Isomeric Mixtures of Xylenes and Ethyl
Benzene (Opredeleniye smesey izomerov ksilola i e-,ilbenzola)
PERIODICAL: Zhurnal analiticheskoy khimii, 1958, Vol- 13, Nr 4, PP. 487-
491 (USSR)
ABSTRACT: The chemical methods for the determination of the content of
various isomers in technical xylene are widely spread as they
have a high accuracy and do not reqaire complicated apparatus.
All those methods (Refs 1-13) have, however, certain disad-
vantages. The method described in the present paper makes pos-
sible the quantitative determination of all 3 isomeric xylenes
as well as of ethyl benzene. It is based on the nitration of
the mixture and the determination according to an earlier de-
scribed method (Ref 14) of the trinitro compounds obtained. The
o-x,ylene which boils by 5,3 0 higher than the next lower boiling
isomer m-xylene (Ref 15) was earlier separated quantitatively
by fractional distillation and then was determined. The resid-
ual mixture of the other ) isomers wan nitrated in 2 stages:
the first stage lead to the dinit.ro compounds, whereas the sec-
Card 1/3 ond stage supplied the trinitro products. The nitrated xylenes

SOV/',,~- 13-4-21/29
The.Determination 0i Isomeric Mixtures of Xylenes and Ethyl Benzene
were weighed as a sum. The nitro derivatives of ethyl benzene
which are in alcohol by far better soluble than the trinitro
derivatives of the -,a- and p-xylene (Ref 16) were separated by
repeated washing of the mixture with alcohol. Then it was
weighed again. The ratio between the 2 residual components was
determined according to the solidification tempera-.ure and the
corresponding fusion diagram (Ref 14). In the alcoliol extract
there are contained, besides the nitro derivatives of ethyl
benzene, also the not completely nitrated derivatives of m- and
p-xylene. On the conditions of the nitration mentioned in this
paper the amount is about 2% of the amount of trinitro-m-xylene
and about lCr/Jo of the amount of trinitro-p-xylene. These values
were taken into account in the determination of the trinitro
ethyl benzene. Based on the results of the analyses the authors
det":,~cmined empiric coefficients by means of which the actual
content of the 3 isomers in the mixture may be calculated from
the gravimetric results obtained if the conditions mentioned
for the nitration were complied with. Some samples treated this
way were also spectroscopically analyzed.(This work was carried
out by A. 11~ Aleksandrov at the Physical Laboratory of the
Card 2/3 Scientific Research Institute of the Ministry o!' Petrolem

SOV/75-13-4-21/29
The Determination of Isomeric Mixtures of Xylenes and Ethyl Benzene
Industry in Leningrad (v fizicheskoy laboratorii Lenin-
g:radakogo n. -i. instituta Ministerstva neftyanoy
ptomyshlennosti)). Either method supplied well reproducible
results. Also a method for the determination of the content
of isomeric xylene in the mixtures containing a great part of
ethyl benzene (>85%) was elaborated. Either method of deter-
mination is described in detail. N. Ye. Khromova-Borisova and
N. G. Borzova participated in the work. There are I figure,
4 tables, and 23 references, 10 of which are Soviet.
ASSOCIATION: Leningradskiy tekhnologicheskiy institut im. Lensoveta (Lenin-
grad Technological Institute imeni Lensovet)
SUBMITTED: may 11, 1957
1. Xylenea--DeterkG6itJLon--- 2. Ethyl benzenes-Determ--Tnation
3. Xylenes-Isomerism 4. Ethyl benzen-es-Isomerism
Card 3/3

5W
AUTHORS:
TITLE:
PERIODICALt
ABSTRACT:
Card 1/2
SOV/79-29-8-49/81
Leytman, Ya. I.t Pevzner, M. S.
~T!~~~~f Ahe Sulfonation of Xylenes and Ethylbenzene
Zhurnal obahchey khimii, 1959, Vol 29, Nr 8, pp 2674-2676 (USSR)
There are data available in publications on the problem of the
thermal effect of the sulfonation reaction of aromatic compounds
with respect to naphthalene (Ref 1) and re8orcinol (Ref 2). In
the present paper, the authors investigated the thermal effect
of the sulfonation of all isomers of xylene and ethylbenzene. For
this purpoL. the isomers of xyle-ie and ethylbenzene -with the
constants given in table 1 were used. Sulfonation was carried out
with 96.5Yo sulfuric acid. The reaction proceeds sufficiently
quickly, and the evolution of heat takes 8-10 min. The calori-
meter used for the determination of the thermal effect (Fig ) is
described in detail. The thermal effect of the reaction 4H was
calculated according to the formula
AH - K.4to.106 kcalzg-mole , 'where K= heat value of the system
9
in kcal/degree,,& to= temperature increase in the calorimeter
(corrected), 106 = molecular weight of the xylene isomers and
ethyl benzene, g. weight of the hydrocarbon in grams. Table 2

Thermal Effect of the Sulfonation of Xylenes and Ethylbenzene SOV/79-29-8-49/81
presents the final results of the experiments~ Since in the
experiments sulfuric acid was used in considerable excess
(300-3000 fold), the variation of its concentration was extrezely
small during the experiment. Consequently, the thermal effect is
the differential effect for VL given concentration of sulfuric
acid. The thermal effect of the sulfonation reaction as such is
determined by deduciixg the differential heat of the dilution
of the sulfuric acid from the total thermal effect obtained ex-
perimentally (Ref 4). The data indicate that the thermal effect
of the sulfonation reaction of xylene isomers and ethylbenzene
is expressed in 34-42% of the total thermal effect of the sulfona-
tion process. The values obtained are: for m-xylene 3.9, n-xy-
lene 4.1, o-xylene 5-5, and ethylbenzene 5 .1 kcal/g-mole, re-
spectively. There are 1 figure, 2 tables, and 4 references, 3
of which are Soviet.
ASSOCIATION: Leningradskiy tekhnologicheskiy institut imeni Lensoveta (Lenin-
grad Technological Institute imeni Lensovet)
SUBMITTED: July 7,'1958
Card 2/2

ILWTMAII, Ya.I.; SOROXIN, V.I;; TSELINSKIY, I.V.
Kinetics of the sulfonation of 1,3,5-trimethylbenzene (mesit7lene)
and 1,2,4-trimethvlbenzone (pseudocumene), and hydrolysis off their
sulfoni*c acids. Zhur. prikl. khim. 33 no-8:1875-1882 Ag 960.
(MIRA 13:9)
1. Loningradsldy tekhnologicheskiy institut imeni, Lensoveta.
(Hesitylene) (Benzene) (Sulfonation)

,~UYTMANp Ya.I*; DIYAROV, I.N.
Unetico of the sulfonation of othyltoluene isomers by wilfaric
acid; Zhur, prikl, khim. 34 no.2:376-382 F 161, (MM 14:2)
I.-Leningradakiy tekhnologicheskiy inotitut imenj Leneoveta.
(Toluene) (Bulfonation)

LEMIAN Ya.I.; DIRROV, I.N.
Separation of amixture of ethyltoluenes into individual
isomers. Zhur.priklekhim. 34 no.8:186&-1874 A 161.
fMIFA 3-4: 8)
1, leningradakiy tekhnologicheoldy institut Imeni lansoveta,
(Toluene)

LEYTMAN, Ya.I.; DIYAROV, I.N.
kinetics of the sulfonation of hemimillitente(1)2,3-trimethyl-
benzene) and of the hydrolysis of Its sulfonic acid. Zhur.prUd.
khim. 34 no.9:1920~-1926 S 161. (MIRA 14:9)
1. Leningradskiy tekhnologicheskiy insiftut imeni Lensoveta.
(Benzene) (Benzenesulfonic acid)

LEYTIMI Ya I - DIYAROV, I.N.; PEVZNER, M.S.
= ~ -" - ~-- - 0 ~-e ~-
Isnmeric composition of C9 aromatic hydrocarbona of the fraction
of 150 - 3.700C of catalytic reforming products. Neftekhimiia 2
no.2:2.42-247 Mr-Ap 162. (MIRA 15:6)
10 leningradskiy tekhnologicheskiy institut imeni Lensoveta.
(Hydrocarbons--SDectra) (petroleum-Refining)

XEYTM", U.I.; PZVZNER, M.S.
Development of the methods of preparing diethyltol-ide, a re Ilent,
Mxu-.prikl.kbJm. 36 no.3.-632-639 My 163. (JURA 16:T
1, Leningradskiy tekhnologicheskiy institut imeni. Lensoveta.
(iAuamide)