Process for extracting tungsten from alkali metal tungstate solu

Details Process for extracting tungsten from alkali metal tungstate solu Process for extracting tungsten from alkali metal tungstate solu

1985-10-11

1988-07-26

Miller, Edward A.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vib metal

75101BE, C01G 4100

Patent

active

047599154

ABSTRACT:
An improvement is disclosed in a process wherein tungsten values are extracted from an aqueous alkali metal tungstate solution by an organic extractant, and then stripped from the organic with an ammonia solution, the improvement being removing bromine from the major portion of the stripped organic and thereafter using at least a portion of the resulting bromine-free stripped organic to make up at least a portion of the organic extractant.

REFERENCES:
patent: 4175109 (1979-11-01), Kim
patent: 4238294 (1980-12-01), Takeuchi et al.
patent: 4360503 (1982-11-01), Boyer et al.
patent: 4374099 (1983-02-01), Kim et al.

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