Recovery of precious metal values from ores

Details Recovery of precious metal values from ores Recovery of precious metal values from ores

1974-07-22

1976-10-26

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Platinum group metal

423 44, 423491, 75 83, 75113, C01G 5500, C01G 500, C01G 700

Patent

active

039884155

ABSTRACT:
A process for the recovery of precious metal values from ores whereby the ore, in particulate form is heated with a mixture of solid (dry) chloride and nitrate salts, in the absence of oxygen. The precious metal values are recovered in the form of the corresponding chlorides which are removed from the system by sublimation or vaporization. The chlorides of the precious metal values are then trapped, separated and can be reduced by conventional methods. Gold, silver and platinum are particularly amenable to recovery from complex ores by this method.

REFERENCES:
patent: 3021209 (1962-02-01), Murray et al.
patent: 3049422 (1962-08-01), Wolcuth

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