Recovery and purification of iridium

Details Recovery and purification of iridium Recovery and purification of iridium

C - Chemistry, Metallurgy

01

G

53/168

C01G 55/00 (2006.01)

Patent

CA 1086069

ABSTRACT A method of recovering iridium from a solution thereof containing impurities in the form of other platinum group metals and/or base metals comprising; oxidising 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 ion-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.

280088

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