Extraction separation vanadium and molybdenum from stone coal acidic leach solution

Extraction separation vanadium and molybdenum from stone coal acidic leach solution using P₂0₄was studied. Some parameters of extraction and stripping, such as pH of solution, the species of strippingagent, the concentration of stripping agent and the volume ratio of organic phase to aqueous phase wereoptimized by a series o f tests. The results showed that after deacidizing the stone coal acidic leach solutionwith Na₂S₂O₃, the extraction of vanadium and molybdenum can reach 84.1 % and 81.1 %, respectively. Thestripping of vanadium can reach above 99 % using 1.5 mol/L H₂SO₄ as the stripping agent and molybdenumcannot be stripped under this condition. When 60 g/L NH₄HCO₃ solution was used as the strippingagent, molybdenum can be stripped effectively and the stripping can reach 76.4 %. Vanadium andmolybdenum can be separated by using different stripping agent in the process of stripping.