Process for eluting precious metals from activated carbon

Details Process for eluting precious metals from activated carbon Process for eluting precious metals from activated carbon

C - Chemistry, Metallurgy

22

B

C22B 11/00 (2006.01) C22B 11/08 (2006.01)

Patent

CA 2296827

A process is disclosed for the recovery of gold and/or silver values from activated carbon, wherein they are adsorbed as cyanide complexes. The process uses an eluant containing sugar. The process allows the eluant to pass through fresh carbon twice, thereby reducing the volume of the gold-loaded eluant. This, in turn, reduces the size of the electrowinning or zinc precipitation circuits. The process also improves elution efficiency when barren electrowinning solution is recycled in the elution process.

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