Method for separating tungsten from molybednum

Details Method for separating tungsten from molybednum Method for separating tungsten from molybednum

1988-10-26

1991-03-12

Andrews, Melvyn J.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vib metal

423606, C01G 3902

Patent

active

049991698

ABSTRACT:
A method of separating tungsten from molybdenum wherein impure acid leached molybdenum trioxide containing tungsten is combined with ammonium hydroxide to form an ammonium molybdate solution, the solution is contacted with tin (IV) oxide hydrate to cause sorption of essentially all of the tungsten contained therein without causing sorption of molybdenum, the tin (IV) oxide hydrate with the sorped tungsten is separated from the ammonium molybdate solution, and the ammonium molybdate solution is dried and fired to obtain purified molybdenum trioxide.

REFERENCES:
patent: 4702895 (1987-10-01), Cheresnowky et al.
patent: 4885144 (1989-12-01), Cheresnowsky

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