C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/142
C22B 34/22 (2006.01) C01G 31/02 (2006.01)
Patent
CA 1231840
ABSTRACT OF THE DISCLOSURE 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.
476555
Rodriguez Domingo
Salazar Ramon
Schemel Roberto
Intevep S.a.
Marcoux & Sher Swabey Mitchell Houle
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