Process for recovering tungsten from MoS.sub.3 /WS.sub.3 precipitates
US4490339A · kind A · utility
1Cited by
5References
4Claims
0Family size
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Key dates
| Filing date | Feb 6, 1984 |
| Grant date | Dec 25, 1984 |
| Priority date | — |
| Expiry date | Feb 6, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B34/36
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process is provided for recovering molybdenum and tungsten separately from a sulfide cake containing the same along with arsenic as an impurity. The process comprises dissolving essentially all of the tungsten and molybdenum values contained in the cake in a caustic solution containing at least about 5 but not more than about 6 moles of sodium hydroxide per mole of tungsten plus molybdenum contained in the cake, separating insoluble material from the resulting leach solution and then precipitating one metal value from the group consisting of molybdenum and tungsten preferentially from the other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.