Process for recovering tungsten from MoS.sub.3 /WS.sub.3 precipi

Details Process for recovering tungsten from MoS.sub.3 /WS.sub.3 precipi Process for recovering tungsten from MoS.sub.3 /WS.sub.3 precipi

1984-02-06

1984-12-25

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vib metal

423 55, C01G 4100, C01G 3900

Patent

active

044903391

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.

REFERENCES:
patent: 2339888 (1944-01-01), Smith
patent: 4303622 (1981-12-01), Huggins et al.
patent: 4303623 (1981-12-01), Huggins et al.
patent: 4320095 (1982-03-01), Yuatrini et al.
patent: 4353878 (1982-10-01), Yuatrini et al.

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