Method for precipitating vanadium from vanadium bearing liquors

Details Method for precipitating vanadium from vanadium bearing liquors Method for precipitating vanadium from vanadium bearing liquors

1984-03-15

1985-10-22

Carter, H. T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vb metal

423 62, 423 66, 423140, 423150, 423 64, C01G 3100, C01G 5304

Patent

active

045487928

ABSTRACT:
A method for precipitating vanadium from vanadium bearing liquors comprises adjusting the pH of the vanadium bearing liquor with a precipitating agent selected from the hydroxides of Na, K and Ca to a range of about 5.5 to 6.5, preferably 6.0 to 6.2 so as to precipitate vanadium in the trivalent and tetravalent states. Remaining traces of vanadium are then cemented by additions of calcium hydroxide, calcium oxide or mixtures thereof. The dried precipitate is then heated in the presence of air and Na and/or K so as to form a reaction product in the form of a water soluble salt which, when dissolved in water, results in vanadium in its pentavalent state.

REFERENCES:
patent: 828850 (1906-08-01), Haynes et al.
patent: 1430864 (1922-10-01), Thews
patent: 4039582 (1977-08-01), Nasyrov et al.

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