Electrolytic process for dissolving platinum, platinum metal...

Details Electrolytic process for dissolving platinum, platinum metal... Electrolytic process for dissolving platinum, platinum metal...

C - Chemistry, Metallurgy

25

C

C25C 1/20 (2006.01) C25B 1/00 (2006.01)

Patent

CA 2111791

The present invention concerns an electrolytical process for dissolving platinum, plahinuan metal impurities andlor platinum metal alloys, in particular with contents of Rh, Pd, Tr, Au and AG, in aqueous hydsoehloric acid. The process according to the invention is characterized in that the dissolution process takes place in an electrolysis cell subdivided by a ration exchanger membrane, if suitable in the presence of platinum metal salts or platinum metal acids, at temperatures between 50 and 110°C, under potentiostatic or voltage- controlled conditions in the range of 2.5 v to 8 v and under a current density, of 0.3 to 7.0 A/dm2. In contrast to the known processes, the process according to the invention operates with minimal requirements in terms of safety technology and apparatus and causes minimal stress to the environment.

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