Pressure leaching of nickel and cobalt sulphides with chlorine u

Details Pressure leaching of nickel and cobalt sulphides with chlorine u Pressure leaching of nickel and cobalt sulphides with chlorine u

1995-11-16

1997-01-21

Gorgos, Kathryn

Electrolysis: processes, compositions used therein, and methods

Electrolytic synthesis

Preparing single metal

205589, 4231501, C25C 106

Patent

active

055956424

ABSTRACT:
A method of pressure leaching nickel and cobalt from sulphidic precipitates is provided, wherein such precipitates are leached with chlorine at a controlled redox potential of between 400 and 550 mV (Ag/AgCl), catalysed by copper, and at a temperature of between 120.degree. and 160.degree. C., to dissolve at least 80% of cobalt and to oxidize less than 10% of sulphur to sulphate.

REFERENCES:
patent: 3880653 (1975-04-01), Hougen
patent: 4062924 (1977-12-01), Glaum
patent: 4304664 (1981-12-01), Victorovich et al.
patent: 4377410 (1983-03-01), Thomas
patent: 4828809 (1989-05-01), Thomassen et al.
patent: 4927794 (1990-05-01), Marcantonio

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