SCIENTIFIC ABSTRACT VAGINA, N.S. - VAGNER, R.I.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R001858330005-8
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: August 31, 2001
• Sequence Number: 5
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

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AUTHORt Vagina, N. S.
TITLEi Complex formation of lanthanum
PERIODICALi Zhurnal neorganicheskoy khimi'-, v, 6, ro. 7. 1Q161, 11565-1216e
TEM The possibility 3f separating lanthan= from the other rare earths
by applying ethylene diamine tetraacetic a-lid or ritrolo ~riacetic acid,
was studied,. A mixture of the following compooll-.1on w&e usei for
experimentingt 12.5~ La, 2.5~ Ce, 7,.0% Pr, 56.,~ Nd, 11 Sm, 13~% Gd,
O.c,)% Tb, 1.5~. Dy, 4-5~ Y (the values were determined by spectral snalyais).
The respective complexone was added to the m:xture arl the non-complex
bound portion precipitated with ammonium oxalate or 'adsorbed on a :a-ion
exchanger YV-2 (KU-2), The -1arthan,,:,m and neodym,-um concentrattorie w6re
radiometrically determined by means of the indIsators La i40 and NI' 47
3yetematio experiments with ethylene i:amine tetraacetic a~,.d (.EDTA)
ohowed the followingi No esBentlal larthanum onrlt,.hmont takes plarij In the
range pH - 3.0 to 7.0 and ITd/EDTA o 1,0,,rl to W.", Dfferent -reEij'-.9
Card 1/3

24727
S/C78/61/006/CO7/0',)4/C'4
Complex formation of lanthanum B107/B217
1<
were obtained with nitrilo tria.-etin. ac-d (NTA)s At a NdsVTA - 't2 ratio V
and a pH of 5,0 to 5,5, the solut_4on contains approximate:Y 30 La, the
precipitate 35~ La- Even more favorable resuts are ottained with t~e
ion exchanger KU-2i 2~ La in the 60lUtiLn, 7C~ La in the adsorbed
mixture. From another initial mixture. ' kg was obtained by the latter
method. The composition of the prodl~r,,ts waa aetermined by sp?~~tral
an sly a i s. The Table shows that it is poosible to aeparate '19.r~thantlm
successfully In the above described way,. There i%ra 6 tables and 4
referenceat I Soviet-bloc and 3 rcn-5oviet-'c'.n_- The r4forente to
English-language putlisatil(,P reads as fc.,~wai H., Fogg, Z. Hess j, knerChem
Soo,, 2.9 1,1151 ('936).
ASSOCIATIONs Institut gookhimii i analitiohookoy khimii im. V. I. Ver-
nadekogo Akademii nauk SSSR (Institute of Geochemistry and
Analytical Chemistry imeni V. I. Vernadskiy of the Academy
of Sciences USSR)
SUBMITTEDt MaY 319 1960
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S/07 61/0061/0071/004/014
Complex formation of lanthanum B107YI3217 V~
Table La
Initial mixture 60.0
Solution 6.0
Precipitate 93.0
Contents
Ce Pr Nd Sm Gd Tb Dy y
2-5 11.0 20.0