Process for the recovery of indium

Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group iiia metal or beryllium

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75101BE, C01G 1500

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active

043729223

ABSTRACT:
The invention is directed to a process for the recovery of indium contained as an impurity in aqueous solutions in concentrations less than 1 gram per liter, by extracting indium from an aqueous solution by contacting with a first phase, which consists of a diester of phosphoric acid. The diester of phosphoric acid extracts indium in proportionally greater quantities relative to the extraction of other metals present in the aqueous solution. The extracted indium is stripped from the first phase by contacting the first phase with a stripping phase.

REFERENCES:
patent: 2238437 (1941-04-01), Zischkau
patent: 2241438 (1941-05-01), Zischkau et al.
Akerman et al., Chemical Abstracts, vol. 73, 1970, #37033w, p. 90.
Levin et al., "Doklady Academii Nauk SSSR", vol. 139, No. 1, 1961, pp. 158-159.

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