Precious metal recovery using thiocyanate lixiviant

Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium

Reexamination Certificate

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C075S744000, C423S027000

Reexamination Certificate

active

07947108

ABSTRACT:
Mineral materials comprising copper and precious metal are subjected to an acidic leach of the copper followed by an acidic thiocyanate leach of the precious metal.

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