Vanadium Extraction Process
The filtrate is then treated through six stages of solvent extraction consisting of two 3-stage mixer-settler units in series to extract the vanadium. The organic extractant is a kerosene solution containing 6% di-2-ethyl-hexyl phosphoric acid and 3% tributyl phosphate. Anhydrous ammonia is added to the fourth stage mixer to adjust the pH to 1.7.