Patent ID: 9702025
Date: 2017-07-11
CPC Classifications: C22B,Y02P

Claim:
1. A method for extraction and recovery of vanadium from its ores, the method comprising the steps of: (i) acid leaching of an ore containing vanadium, titanium and iron to extract vanadium and iron into solution and to form a solid residue containing titanium; (ii) passing said solution and said solid residue of leach step (i) to a solid/liquid separation step; (iii) passing a liquid product of separation step (ii) to a solvent extraction step in which vanadium and iron are extracted into an organic extractant from that liquid product; (iv) passing a loaded organic extractant produced in step (iii) to a stripping step in which acid is used to selectively and sequentially strip the vanadium and iron from the organic extractant; (v) passing the vanadium containing strip solution of step (iv) to a recovery step; and wherein the acid leaching is conducted in the range of about 25° C. to 80° C. under atmospheric pressure.