Recovery and purification of iridium

Details Recovery and purification of iridium Recovery and purification of iridium

1977-06-15

1978-12-19

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Platinum group metal

75101BE, C01G 5500

Patent

active

041306252

ABSTRACT:
A method of recovering iridium from a solution thereof containing rhodium and impurities in the form of base metals comprising; oxidizing the iridium to the Ir(IV) oxidation state in an acid solution in the presence of chloride ions; removing the iridium chlorocomplexes formed using a suitable anion-exchange resin; washing the resin; treating the iridium with an aqueous solution of sulphur dioxide which is substantially free of chloride ions; and thereafter eluting the iridium complex formed from the resin using a suitable eluant.

REFERENCES:
patent: 3979207 (1976-09-01), MacGregor
patent: 3999983 (1976-12-01), Grosbois

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