Abstract: With a stone coal in Hubei as raw material, the technical parameters in the extraction process of vanadium purification acid leaching solution were studied. The results indicated that with Na₂SO₃ used to pre-treat the acid leaching solution, the effect of Fe³⁺ and V⁴⁺ on the extraction was efficiently removed, and the extraction rate improved at the same extraction level. The total extraction rate at level 5 is 99.29% when Ph value for appropriate extraction is 2 and the ratio of organic phase and water phase is 3∶1 with the extraction time for 8 min; Total extraction rate at stripping level 8 reaches 99.70% when the suitable ratio of organic phase and water phase for stripping is 10∶1 and the volume concentration of the sulfuric acid solution as stripping agent is 8%.

Key words: Vanadium, Acid leaching solution, Extraction solution, Extraction, Stripping