Process for producing tungstosilicic acid

Details Process for producing tungstosilicic acid Process for producing tungstosilicic acid

1989-06-16

1989-12-26

Doll, John

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

210681, C01B 3320

Patent

active

048897035

ABSTRACT:
A process is disclosed for producing tungstosilicic acid which involves adding sodium silicate to a first solution of sodium tungstate while assuring that the pH of the resulting mixture is from about 2 to about 6, the pH adjustments being made with a cation exchange resin on the hydrogen cycle, to produce a second solution. The solids are removed from the second solution which is digested at a temperature of greater than about 50.degree. C. and then contacted with a cation exchange resin on the hydrogen cycle to produce a third solution which is essentially a tungstosilicic acid solution containing at least about 99% by weight of the starting tungsten as tungstosilicic acid.

REFERENCES:
patent: 2503991 (1950-04-01), Bechtold
patent: 3361518 (1968-01-01), Chiola et al.
patent: 3947332 (1976-03-01), Vanderpool et al.
patent: 4595508 (1986-06-01), Wolfe et al.

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