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US 4,283,257 AGranted
Process for preparing ammonium metatungstate
AssigneeGTE Products Corporation
InventorsClarence D. Vanderpool, Martin B. MacInnis
Life of this patent
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Abstract
In a process for producing ammonium metatungstate from ammonium paratungstate, ammonium paratungstate is introduced in the anode chamber of an electrolytic cell which is separated from the cathode chamber by an inert liquid permeable media, when a direct electric current is passed through the cell, ammonium ions migrate to the cathode compartment resulting in an increased concentration of metatungstate in the anode chamber.
Claims9
A process for producing ammonium metatungstate from ammonium paratungstate comprising:
- introducing ammonium paratungstate into an anode chamber of an electrolytic cell having an anode in an anode chamber and a cathode in a cathode chamber, said cell containing an aqueous electrolyte and including an inert liquid permeable media separating the anode chamber from the cathode chamber, passing a direct electric current through said cell for transporting ammonium ions from the anode chamber through the liquid permeable media to increase the concentration of ammonium metatungstate in the electrolyte within the anode chamber, and withdrawing ammonium metatungstate from the anode chamber.
Dependencies are inferred from the claim text.