Patent ID: 8871163

Claim:
A process for purifying vanadium oxide, comprising: (a) loading vanadium oxide on a cationic exchange resin by contacting a first vanadium oxide-containing aqueous solution with the resin to provide a cationic exchange resin loaded with vanadium oxide; (b) stripping vanadium oxide from the cationic resin loaded with vanadium oxide by contacting the cationic exchange resin loaded with vanadium oxide with acid to regenerate the resin and to provide a second vanadium oxide-containing aqueous solution, wherein the concentration of vanadium oxide in the second solution relative to other cationic metals is greater than in the first solution; (c) extracting the second vanadium oxide-containing aqueous solution with an organic solvent comprising a chelating agent to provide an aqueous solution and an organic solvent containing vanadium oxide; (d) separating the organic solvent containing vanadium oxide from the aqueous solution; and (e) releasing vanadium oxide from the organic solvent by contacting the organic solvent containing vanadium oxide with an aqueous solution to provide a third vanadium oxide-containing aqueous solution, wherein the concentration of vanadium oxide in the third solution relative to other cationic metals is greater than in the second solution.