Method for thiosulfate leaching of precious metal-containing...

Details Method for thiosulfate leaching of precious metal-containing... Method for thiosulfate leaching of precious metal-containing...

C - Chemistry, Metallurgy

22

B

C22B 11/00 (2006.01) C22B 3/12 (2006.01) C22B 3/22 (2006.01) C25C 1/20 (2006.01)

Patent

CA 2698578

Processes are provided for recovering precious metals from refractory materials using thiosulfate lixiviants. The processes can employ lixiviants that include at most only small amounts of copper and/or ammonia and operate at a relatively low pH, reduction of polythionates, inert atmospheres to control polythionate production, and electrolytic solutions which provide relatively high rates of precious metal recovery.

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