VANADIUM PENTOXIDE OBTAINING METHOD Russian patent published in 2013 - IPC C22B34/22 C22B3/12 C01G31/02 

FIELD: metallurgy.

SUBSTANCE: method involves decomposition of vanadium oxytrichloride with alkali solution so that sodium metavanadate is obtained; loading of solid ammonium-containing non-organic compound so that pulp of ammonium metavanadate is obtained; then, ammonium metavanadate deposition, its flushing, drying and roasting till vanadium pentoxide is obtained. Sodium carbonate mixed with sodium hydroxide at the weight ratio of (0.05-0.1):1 is used as alkali solution; for that purpose, first, solid sodium carbonate and then, solution of sodium hydroxide at mass concentration of 100-150 g/l is loaded subsequently to water solution in the form of mother solutions from flushing of pulp of sodium metavanadate and flushing of pulp of ammonium metavanadate. Solution of vanadium oxytrichloride is loaded to the obtained alkali solution till content of pH of the medium, which is equal to 7-8 so that pulp is obtained. After filtration of the pulp the mother solution of sodium metavanadate is treated with solid salt of ammonium-containing non-organic compound so that ammonium metavanadate pulp is obtained.

EFFECT: increasing degree of vanadium extraction to finished product.

9 cl, 1 ex