Process for recovering tungsten from cemented tungsten carbide

Details Process for recovering tungsten from cemented tungsten carbide Process for recovering tungsten from cemented tungsten carbide

1979-12-26

1981-03-17

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vib metal

423138, 423 53, C01G 4100

Patent

active

042567084

ABSTRACT:
In a process for recovering tungsten from cemented tungsten carbide, the cemented tungsten carbide is oxidized to form an oxidized product which is digested in an aqueous solution of an alkali metal hydroxide to form a water soluble alkali metal tungstate portion and an insoluble portion. The improvement of the present invention provides for recovery of tungsten values from the above mentioned insoluble portion by digesting the insoluble portion in an aqueous alkali metal hydroxide solution with a suitable amount of titanium oxide to promote the formation of a soluble alkali metal tungstate.

REFERENCES:
patent: 2704240 (1955-03-01), Avery
patent: 3635674 (1972-01-01), Shwayder
patent: 3887680 (1975-06-01), MacInnis et al.

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