THE SEPARATION OF INDIUM AND TIN BY ALKYLPHOSPHORIC ACIDS

Journal Article · Wed Jun 21 04:00:00 EDT 1961 · Doklady Akad. Nauk S.S.S.R.

OSTI ID:4841905

Levin, I S; Mikhailov, V A

A mixture of isoamylphosphoric and isoamylpyrophosphoric acids was obtained by reacting isoamyl alcohol with P/sub 2/0/sub 5/- A 20 vol.% solution of this extractant in benzene or toluene was used to develop a simple, effective method of separating indium from tin. The tracers In/sup 114/ and Sn/sup 113/< s,>s/sup 123/ were used to follow the course of the extraction. It was found that indium extracts with a very high distribution coefficient from even 10 N H/ sub 2/SO/sub 4/ and higher, while divalent tin remains almost quantitatively in the aqueous phase. The separation coefficient is 10/sup 6/ during the extraction. The indium can be back-extracted with a small amount of 6 to 9 N HCl with a 10- to 20-fold concentration of indium. The method gives sharp separations even when the ratio of Sn to In is varied from 10: 1 to 10:5000. Tetravalent tin can be removed by washing with an HF solution. Analogous results were obtained with di- (2-ethyl) hexyl phosphoric acid. The method can be employed as an analytical method or as an industrial process. (TTT)

• Research Organization: Inst. of Chemistry and Metallurgy; Inst. of Inorganic Chemistry, Siberian Branch, Academy of Sciences, USSR
• NSA Number: NSA-15-027703
• OSTI ID: 4841905
• Journal Information: Doklady Akad. Nauk S.S.S.R., Journal Name: Doklady Akad. Nauk S.S.S.R. Vol. Vol: 138
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ALCOHOLS
ALKYL RADICALS
AMYL RADICALS
BENZENE
CHEMICAL REACTIONS
CHEMISTRY
DEHPA
DISTRIBUTION
ETHYL RADICALS
HEXYL RADICALS
HYDROCHLORIC ACID
HYDROFLUORIC ACID
INDIUM
INDIUM 114
ISOMERS
ORGANIC PHOSPHORUS COMPOUNDS
PHOSPHORIC ACID
PHOSPHORUS OXIDES
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
SULFURIC ACID
TIN
TIN 113
TIN 123
TOLUENE
TRACER TECHNIQUES
USES