Process for the selective dissolution of cobalt from cobaltite-p

Details Process for the selective dissolution of cobalt from cobaltite-p Process for the selective dissolution of cobalt from cobaltite-p

1982-09-28

1984-07-03

Doll, John

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Iron group metal

423146, 423150, 423558, 423 87, C01G 5100

Patent

active

044578970

ABSTRACT:
A hydrometallurgical process for the recovery of cobalt from cobaltite-pyrite concentrates containing substantial amounts of cobalt, arsenic, iron and sulphur is disclosed. The hydrometallurgical process comprises pressure leaching of the cobaltite-pyrite concentrates with a sodium chloride or sodium sulphate solution at a temperature in the range of 130.degree.-160.degree. C. and under oxygen partial pressures in the range of 75-200 psi to solubilize at least 90% of the cobalt content, while simultaneously precipitating most of the iron and arsenic as jarosite and ferric arsenate.

REFERENCES:
patent: 2296423 (1942-09-01), Clark
patent: 2686114 (1954-08-01), McGauley
patent: 2898197 (1959-08-01), Forward
"Le cobalt en France", by E. M. Elchardus and J. F. Reynaud, Chimie Et Industrie, vol. 86 (5) 1961, pp. 531-541.
"Leach Licks Arsenic Bugaboo in Metal Ore", C. H. Chilton Chemical Engineering, Jan. 13, 1958 (vol. 65 (1), pp. 80-82.
"Pressure Leaching and Reduction at the Garfield Refinery", J. S. Mitchell, Mining Engineering, Nov. 1956 (vol. 8) pp. 1093-1095.
"The Generation of Sulphuric Acid from Pyrite by Pressure Leaching", by I. H. Warren, Australian Journal of Applied Science, vol. 7, 1956, pp. 346-358.

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