Recovering metals from sulfidic materials

Details Recovering metals from sulfidic materials Recovering metals from sulfidic materials

2003-12-19

2010-12-28

Hendrickson, Stuart (Department: 1793)

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Platinum group metal

C423S027000, C423S038000, C423S025000, C075S744000, C205S570000

Reexamination Certificate

active

07858056

ABSTRACT:
A process for recovering a precious metal from a sulfidic material comprises the steps of preparing an acidic aqueous halide solution having an oxidation potential sufficient to oxidize the sulfidic material and render the precious metal soluble in the solution, adding the material to the acidic aqueous halide solution so that the sulfidic material is oxidized and the precious metal is solubilized and separating the precious metal from the oxidized sulfidic material. In addition, a process for removing a contaminant from a contaminated sulfidic material comprises the steps of mixing the material in an aqueous solution wherein a multi-valent species of a relatively high oxidation state oxidizes the contaminant to render it soluble in the solution, produces a contaminant refined material, and is reduced to a relatively lower oxidation state; and removing the contaminant from the solution while regenerating the multi-valent species to its relatively high oxidation state.

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