SCIENTIFIC ABSTRACT LEVIN, I.S. - LEVIN, L.I.

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CIA-RDP86-00513R000929520014-9
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December 31, 1967
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SCIENTIFIC ABSTRACT
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25343 3/02()/61/138/006/010/019 i Separation of indium ... B103/B215 solutions. Indium can even be extracted from *0 X tend higher concen- trated) E2 5o4 with a high distribution coefficient, whereas Sn2-t- is left almost quantitatively In the aqueous phase. The paxtition, coefficient 6. thus reaches 10 In to easily reextracted by washing with am .1 amounts of 6-9 N Hal, Sn 4+ te!ng removed additionally. In an extracticn cycle of 3-4 extraction stages, the indium concentration in the HC-1 re-extract may be increased by 60 - 80 times due to a counter flow of the initial solution (Ref.3# V. A. U-4khaylov, Izv. Sib, oti. AN SSSR, No 4-OgEo)). With a high Sn content it is recommended to use a 100-IrC g/1 acid solution for the extraction since the solubility of Sr and In sulfates in concentrated H.So 4 solutions is low. The acidity of commercial solutions (after electrolytic removal of Sn) contalning glue and ()-naphthol has to be increased up to 400-450 9/1 if good p;,aae separation is wanted. 5n is thenremoved from the organic phase by washing with even stronger H 2S0 4 (700 - 900 9/1). Sometimes, preliminary dilution of the solution becomes Card 2/4 25343 S/020/61/',38/006/019/019 Separation of indium ... B103/B215 necessary. The solutions to be extracted contalnedi 0.75 - 195 g11 of Inp 2+ 4+ 5 - 10 g11 of Sn and 4 - 6 g1l Of Sn , The above method allows a quantitative separation of In from Sn 2+ within the range of Bn t In (30 - 10) t 1 to 5000 1 1 (indicator amounts of In). Indium was thus twice re-extracted by 9 N HCI at 0 1 A - 2.5 t 1. A metallic indium, sponge containing 10 - 25~4 of impurities (mainly Sn4+) was thus obtained from the re-extract by cementation onto zinc or by,electrolysis. Sn4+ was moot easily separated from In by washing the organic phase with HF 0 1 1). The ratio 0 1 A - (30 - 40) j 1 was sufficient, since the distribution coefficient of Sn44 from EF-containing solutions is very low (e, 0.01). Indium sponge can thus be produced with a purity of 98 - 95%. After extraction of indium, the extracting agent may again te added to the cycle. It is recommended to use derivatives of higher alcohols (such as 2-ethyl hexanol) to reduce the losses of extracting agent in the aqueous phase. The above method can be applied to analytical and technoiogical purposes. Card 3/4 25343 5/020J61/138/006/019/019 Separation of indium B103/B215 There are I figure, I table, and 5 referenceut 3 Sovw-blDc and 2 non- Soviet-bloc The reference to English-language pitlication roads as followei Ref.2t E. M. Ssadden. N. E. Ballou. Anal. Chem., 25, 1602 (1953)). ASSOCIATIONt Khimiko-metallurgicheekly institut Sibirskogo otdeleniya Akademil nauk SSSR (Institute of Chemistry and Yetallurgy of the Siberian Branch of the Academy of Sciences USSR) Institut neorganicheskoy khimli Sibirskogo otdeleniya Akademii nauk SSSR (Institute-of Inorganic Chemistry of the Siberian Bransh of the Academy of Sciences USSR) PRESENTEDt December 2, 1960 by I. - V. Tananayev. Academician SUBMITTEDs December 1, 1960 Card 4/4 ID 25485 S/020/61/139/001/017/018 B103/B229 AUTHORSi Levin, I. S. and Zabolotsky, T. V. TITLE: Separation of indium from zinc and accompanying elements by extraction with alkyl phourboric acids PERIODICAL: Akademiya nauk SSSR. Doklady, v. 139, no. 1, 11061, 158-159 TEXT: The authors state that the usual extraction methods are used only in the analytical practice, especially to separate indium from cadmium. The numerous technological variants of the separation of indium from zinc, and also from cadmium, copper, leud, iron, and others, are based on clansical methods of precipitation, electrolysis, cementation, and others. In their work the authors dealt with the extraction separatioy Iof indluT,from the aforementioned elements, and from cobalt. nickel. Fe . and Fe and finally from aluminum and gallium. Mainly, a mixture was used by tt.eul CoDsisting of 10 % pyro-, 10 % di-, sind 00 % monoortyl phonphoric ncid at room temperature and at a ratio of 0 1 A (orgrtintc t aquqrjus) - 1 2. The mixtures were shaken for 5 minutes, although I minute is sufficient to obtain the equilibrium (except for Fe and Al). The authors found that Card 114 25485 5102016111AQ' 01'()17/018 J'/0 / Separation of indium from zinc ... B103/B229 indium can be extracted completely not onij from sulfates of solutions, but also from such of perchloric, nitric. hydrofluoric, oxalic, formic, and other acids, in a wide range of concpntratiO-is., An extraction from a solution of phosphoric and acetic acid Lurno out to be less complete. Halogen bydracids (exceptitig HY) reextract indium even at a ratio of 0 : A - I 1 100. A concentration of indium is thereLy made possible. Thus the authors succeeded in obtaining hydrochloric indium solutions with an In content of 120 130 g/1, whereas tkie initial solutions contained 4.2 g11. Zn, Cd, Ni, and Fe can only be extracted well from weak rulfuric acid solutions (pH 2 - 5). Ti,e distribution coefficients attaining 20 - 60 at these pH-values decrease rapidly with increasine acid concentrati-in and amount to 10- 2 _10-3 in extraction from 10 h' H2SO4. T) separate indium from the aforementioned elements it was extracted from sulfuric acid solutions, whilst the organic phase was washed 3 - 4 times with R 2so 4 (400 - 500 g11), at a ratio of 0 1 A - 3 ; 1. In this case, In remains in tho organic phase. The reextraction was carried out by means of 9 N EC1 (0 : A - 2 j 1). When the experiments were carried out u:.der hard corditions Card 2/4 25485 5/020/61/139/001/017/018 Separation of indium from zinc ... B103/B229 a nearly quantitative separation was achieved. The soluble leod compounds can be extracted well at a slight acidity. However, when the organic phase is washed with 2 N H 25o 4' a fine-crystalline precipitation of lead sulfate, Sn1I) settles down. Those elements tiott form (exactly like in the case of stable fluoride complexes cannot be extracted from the HF-solutions and therefore cannot be sepnrated from indium (exactly like Sn IV ). The alitt.ors III state that a separation of indium from Fe , Al, and gallium, is possible. According to data in the literature its separation Is also possible from uranium, zliconium, thot-ium, scandium. and titanium. From Ue data 6iven by the authors results that all elements analyzed by them (excepting Fe III ) practically do not influence the indium extraction, even in high concen- III concentrations. The indium extraction is suppressed by Fe . whereby its low yield in the reextract can be explained. There are 2 fib-ures, 2 tables, and 10 referencess A Soviet-bloc and 2 non-Soviet-bloc. The two references to English-languaea publications read as follown: B. S. Hunt et al. Ref. 6t Canad. Mining & Metallurg. Bull, No. 566, 359 (1959); Trans. Canad. In3t. 2, 173 (1950); D- C. Madigan (Ref. 10: Austral. J. Mining & Metallurgy, ~ . _ Card 3/4 251485 S102 61/1-0/001/017/018 Separation of indium from zinc... B103YB229 Chem. 21, 59 (1960)). ASSOCIATIONt Khimiko-metallurglaheakly inntitut Sibirskogo otdeleniya Akademil nauk SS3R (Institute of Chemistry and Metallurgy of the Siberian Branch of the Academy of Sciences USSR) Institut neoreanicheslkoy khifuii Sibirskogo otd,-elenlya Akademil riauk SSSR (Institute of Inorganic Chemistry of the Siberian Brinch of the Academy of Sciences USSR) PRESENTED: December 2, 1960#by 1. V. Tananayev, Academiclan SUBMITTEDt December 1, 1960 Card 414 ,~_LEVINS - - . A specific case of element separation by re-extraction. 12V.Sib. otd.AN SSSR no.105-61 162. (MIRA 15:3) 1. Xhimiko-metallurgicheakiy institut Sibirskogo otdoleniya AN SSSH, Novosibirsk. (Extraction (Chemistry)) `---WVIN,- Yu.B. Conference on Extraction in AnLlytical Chemistr7. Zav.lab. 28 no.4:516-517 162. (MM 15:5) (Extraction (Chemistry)-Congreases) (Chemistry, Analytioal) 8/032j62/026/011/001/015 B106/3186 AUTHORSj Levin, I. S., and Azarenkop T. G. TITLEt Determination of small quantities of indium and tin-containing materials by extraction and photometric analysis PERIODICAL: Zavodskaya, laboratoriya, v. 28, no. 11, 1962, 1313 - 1316 TEXTs A method of combined extraction was.slaboratedp by which small quantities of In can be separated from large quantities of Sn and other elements. Preliminary experiments showed that indium and tatravalent tin can be extracted by alkyl phosphoric acids from hydrobalic solutions, thereby, the extractability from isomolar solutions of these acids in- creases for In in the order HC1< HBr4'_