Method for recovering precious metals from precious...

Details Method for recovering precious metals from precious... Method for recovering precious metals from precious...

C - Chemistry, Metallurgy

22

B

53/168, 53/225

C22B 3/00 (2006.01) C22B 7/00 (2006.01) C22B 11/08 (2006.01) C22B 11/10 (2006.01)

Patent

CA 1237283

METHOD FOR RECOVERING PRECIOUS METALS FROM PRECIOUS METAL-BEARING MATERIALS SUCH AS ORE AND TAILINGS by JAMES J. RUSS and JOHN W. SMITH ABSTRACT OF THE DISCLOSURE A method for recovering precious metals such as gold and silver from precious metal-bearing materials that include other solids comprises treating the precious metal-bearing materials with an aqueous, basic solution having a pH in the range of about 12 to about 14 for a time sufficient to suspend the precious metals in substantially free form in the solution, followed by recovery of precious metals from solids and from the solution by known methods.

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