Recovery of tungsten and rhenium

Details Recovery of tungsten and rhenium Recovery of tungsten and rhenium

1985-08-22

1986-08-05

Carter, H. T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group viib metal

423 53, 423 59, C01G 4102, C01G 4700

Patent

active

046042652

ABSTRACT:
A process is disclosed for recovering tungsten and rhenium from a tungsten and rhenium source. The process involves firing the source in an oxidizing atmosphere at a sufficient temperature for a sufficient time to convert the tungsten and rhenium to their respective oxides, to remove a portion of the rhenium as volatilized oxide, and to form a first fired material containing essentially all of the tungsten and the remaining portion of the rhenium, increasing the surface area of the resulting oxidized tungsten, and firing the first fired material in an oxidizing atmosphere at a sufficient temperature for a sufficient time to remove essentially all of the remaining portion of the rhenium as volatilized oxidized rhenium and to form an essentially rhenium-free oxidized tungsten.

REFERENCES:
patent: 2579107 (1951-12-01), Bertolus
patent: 3798306 (1974-03-01), Lapat et al.

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