Process for the recovery of vanadium and molybdenum

Details Process for the recovery of vanadium and molybdenum Process for the recovery of vanadium and molybdenum

C - Chemistry, Metallurgy

22

B

53/142

C22B 34/22 (2006.01) C22B 7/00 (2006.01) C22B 34/34 (2006.01)

Patent

CA 1076362

ABSTRACT OF THE DISCLOSURE The disclosure describes a process of separately recovering vanadium and molybdenum from an aqueous solution containing a vanadium compound and a molybdenum compound. The process comprises the steps of adjusting the pH of the aqueous vanadium-and-molybdenum containing solution to a value between 1.5 and 7; contacting the solution with a weakly basic anion exchanger in the salt form; eluting the anion exchanger with an ammonium hydroxide solution having a strength between about 1 and 4N; and crystallizing the resulting ammonium vanadate and separating same from the vanadium-and-molybdenum solution obtained in the elution. This process makes it possible to carry out stripping with an ammonium hydroxide solution, without any undesirable formation of precipitates.

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