Process for the recovery of nickel and/or cobalt from an ore or

Details Process for the recovery of nickel and/or cobalt from an ore or Process for the recovery of nickel and/or cobalt from an ore or

1996-06-07

1999-01-05

Bos, Steven

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Iron group metal

423140, 423139, B01D 1100, C22B 2300

Patent

active

058558586

ABSTRACT:
A process for the extraction of Ni/Co values from an ore or concentrate comprises the steps of subjecting the ore or concentrate to pressure oxidation in the presence of oxygen and an acidic solution containing halide, copper and sulphate ions to obtain a liquor containing Ni/Co values from the resultant pressure oxidation slurry. The liquor is subjected to a selective precipitation treatment to obtain a solid containing Ni/Co hydroxide. The solid is subjected to a Ni/Co leaching stage with an ammonium solution to produce a leach solution containing Ni/Co values and a residue. The Ni/Co values are separated by solvent extraction to produce solutions suitable for electrowinning of Ni and Co. The process also provides for the recovery of precious metals and other metals such as copper.

REFERENCES:
patent: 2377832 (1945-06-01), Wallis et al.
patent: 2488561 (1949-11-01), Schaal
patent: 2793936 (1957-05-01), Voos
patent: 3642440 (1972-02-01), Holmes et al.
patent: 3728105 (1973-04-01), Skarbo
patent: 3798304 (1974-03-01), Weston
patent: 3933975 (1976-01-01), Nicklic et al.
patent: 4541868 (1985-09-01), Lowenhaupt et al.
patent: 4900522 (1990-02-01), Chou et al.

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