Process for the removal of mercury from precious...

Details Process for the removal of mercury from precious... Process for the removal of mercury from precious...

C - Chemistry, Metallurgy

22

B

53/235

C22B 3/44 (2006.01) C01C 3/08 (2006.01) C01G 13/00 (2006.01) C22B 11/08 (2006.01) C22B 43/00 (2006.01)

Patent

CA 1328352

ABSTRACT This invention is a process for removing mercury from the desorption or cyanide liquor of a precious metal recovery, cyanide leach system. A sulfide ion-providing compound and a flocculating agent are added to the desorption liquor to form and flocculate mercuric sulfide. The desorption liquor typically has a cyanide concentration of between about 0.5 percent and about 2.0 percent by weight. The flocculated mercuric sulfide is separated from a substantially mercury-free precious metal-containing, cyanide solution.

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