ELECTROLYTIC METHOD FOR DISSOLVING PLATINUM, PLATINUM METALS' IMPURITIES AND/OR PLATINUM METALS' ALLOYS CONTAINING RADIUM, PALLADIUM, IRIDIUM, GOLD, AND SILVER Russian patent published in 1997 - IPC

Abstract RU 2094534 C1

FIELD: ELECTROLYTIC PROCESSES. SUBSTANCE: method involves hydrochloric acid treatment in electrolytic cell with soluble anode from initial material and insoluble cathode. Cell is separated by cation-exchange membrane into anode and cathode chambers. Process is carried out in 6-8 N HCl at 50-110 C, acid concentration being maintained constant under controlled-potential or controlled-voltage (2.5-8 V) conditions at current density 0.3-7.0 A/sq.dm. EFFECT: improved environmental safety. 9 cl

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RU 2 094 534 C1

Authors

Zigrid Kherrmann[De]

Uvelandau[De]

Dates

1997-10-27—Published

1993-12-17—Filed