Process for the selective dissolution of cobalt from cobaltite-pyrite concentrates
US4457897A · kind A · utility
5Cited by
3References
12Claims
0Family size
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Key dates
| Filing date | Sep 28, 1982 |
| Grant date | Jul 3, 1984 |
| Priority date | — |
| Expiry date | Sep 28, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/80
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.