Process for the manufacture of ammonium tungstate ammonium parat

Details Process for the manufacture of ammonium tungstate ammonium parat Process for the manufacture of ammonium tungstate ammonium parat

1974-06-10

1976-02-03

Edmundson, F. C.

Chemistry: electrical and wave energy

Processes and products

204180P, 423 53, C25B 100, C25B 122, C01G 4100, C01B 100

Patent

active

039363627

ABSTRACT:
Ammonium tungstate, ammonium paratungstate, ammonium metatungstate or hydrated tungsten trioxide is produced by passing tungstate anions through an anion exchange membrane into an aqueous solution containing ammonium cations under the driving force of an electrical potential for a time sufficient to achieve a pH within the range in which the desired tungsten compound will form.

REFERENCES:
patent: 3464783 (1969-09-01), Patzauer
patent: 3681213 (1972-08-01), Heit et al.

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