Method for recovering precious metals from precious metal-bearin

Details Method for recovering precious metals from precious metal-bearin Method for recovering precious metals from precious metal-bearin

1984-03-09

1986-06-03

Niebling, John F.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75118R, 75121, 210633, 423 22, 423 27, C22B 300, C22B 1104

Patent

active

045927790

ABSTRACT:
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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