Recovery of tungsten from ammoniacal solutions

Details Recovery of tungsten from ammoniacal solutions Recovery of tungsten from ammoniacal solutions

1985-02-25

1986-12-02

Doll, John

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

C01G 4100

Patent

active

046264256

ABSTRACT:
A method is disclosed for recovering tungsten from a relatively dilute ammoniacal tungsten solution. The method involves adding hexamethylenetetramine to the tungsten solution in an amount sufficient to form a hexamethylenetetramine complex then adjusting the pH to from about 1.0 to about 2.0 with a mineral acid to form a precipitate of the complex containing at least about 99% of the tungsten, and separating the precipitate from the resulting mother liquor.

REFERENCES:
patent: 3052516 (1962-09-01), Drobnick et al.

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