METHOD OF VANADIUM EXTRACTING OF WATER SODIUM-BEARING SOLUTIONS Russian patent published in 2009 - IPC C22B34/22 C01G31/00 C22B3/46 

FIELD: metallurgy.

SUBSTANCE: invention relates to methods of vanadium sedimentation from water solutions and can be used in hydrometallurgy of rare refractory metals, particularly receiving of vanadium oxide (V⁺⁵) of high purity. Method of vanadium extraction from sodium-bearing solutions includes electrodialysis of solution for membrane withdrawal of sodium cation from solution and sedimentation of ammonium pol-vanadate. Electrodialysis is implemented at circulation of solution through working chamber of electrodialysis apparatus and at achievement of pH 6.5-7.5 circulating solution is treated by ammonia water or ammonia. Treatment is implemented up to molar ratio Na:V<0.1.

EFFECT: providing of intensification of sedimentation process of vanadium, improvement of finished product and elimination of discharge of industrial flows.

1 dwg, 4 ex