Hydrometallurgical process for the separation and enrichment of

Details Hydrometallurgical process for the separation and enrichment of Hydrometallurgical process for the separation and enrichment of

1986-12-24

1988-09-13

Stoll, Robert L.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75108, 75109, 75112, 75114, 75117, 75118R, 75119, 75120, 75121, 423 22, 423 38, 423 39, 423 40, 423 42, 423 46, 423508, 423509, 423510, C22B 1104

Patent

active

047707003

ABSTRACT:
A hydrometallurgical process for enrichment of gold, platinum and palladium from copper electrolysis anode sludge, and simultaneously recovery of selenium, in which the sludge is treated with Cl.sub.2 /HCl to transform the selenium of a hexavelent state and precipitate out silver chloride. The filtrate is then subjected to selective reduction of precipitate the noble metals and the resulting filtrate is chlorinated and a further reduction is effected to precipitate the metallic selenium.

REFERENCES:
patent: 712640 (1902-11-01), Betts
patent: 4188362 (1980-02-01), Edwards et al.
patent: 4397689 (1983-08-01), Lea et al.
patent: 4615731 (1986-10-01), Thomas et al.
patent: 4666514 (1987-05-01), Bertha

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