Hydrometallurgical processing of precious metal-containing...

Details Hydrometallurgical processing of precious metal-containing... Hydrometallurgical processing of precious metal-containing...

C - Chemistry, Metallurgy

22

B

53/168, 53/232,

C22B 7/00 (2006.01) C01B 19/00 (2006.01)

Patent

CA 1154599

ABSTRACT A process is provided for separating heavy nuisance elements from precious metals selected from platinum group metals and gold which comprises treating an aqueous acid solution containing nuisance elements, precious metals and selenium with SO2 gas in the presence of a halide. The precious metals and selenium are precipitated and are separated from the nuisance elements which remain in solution. The process can be used as a step in an overall hydrometallurgical route for treating refinery residues such as anode slimes for the separation and recovery of precious metal values.

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