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US 4,540,562 AGranted
Process for the production of vanadyl hydrate
AssigneeUmetco Minerals Corporation
InventorHarry E. Gardner
Life of this patent
Estimating the term…
Abstract
A process is provided for the production of vanadyl hydrate including solvent extraction and stripping steps. The vanadyl hydrate is then reacted with carbon to produce vanadium carbide.
Claims15
A method for manufacture of vanadyl hydrate comprising the steps of:
- (a) providing an aqueous solution of vanadate ion;
- (b) adding sulfur dioxide and a non-oxidizing acid to said aqueous solution to reduce said vanadate ion to the vanadyl ion;
- (c) solvent extracting said vanadyl ion from said aqueous solution with an organic solvent comprising di-2-ethyl hexyl phosphoric acid or hepta-decyl phosphoric acid;
- (d) stripping said vanadyl ion from said organic solvent with ammonium hydroxide to form in three separate phases, an organic solution, an aqueous solution and a solid precipitate of vanadyl hydrate;
- and
- (e) separating the solid vanadyl hydrate from said organic and aqueous solutions.
3 more elements
Dependencies are inferred from the claim text.