从石煤酸浸液中萃取分离钒钼

采用P204作为萃取剂富集分离石煤酸浸液中的钒和钼,考察了溶液pH值、反萃剂种类、反萃剂浓度、反萃相比对钒钼富集分离的影响.研究结果表明：经过Na2S2O3还原后的溶液,钒的萃取率可以达到84.1%,钼的萃取率可以达到81.1%;采用1.5 mol/L的硫酸溶液反萃负载钒和钼的有机相,钒的反萃率可以达到99%以上,钼不能被反萃;在O/A为（体积比）3∶1的条件下采用60 g/L的碳酸氢铵溶液可以将钼反萃,其反萃率为76.4%.采用不同的反萃剂,可以实现钒和钼的分离.

Extraction separation vanadium and molybdenum from stone coal acidic leach solution

Extraction separation vanadium and molybdenum from stone coal acidic leach solution using P204 was studied. Some parameters of extraction and stripping, such as pH of solution, the species of stripping agent, the concentration of stripping agent and the volume ratio of organic phase to aqueous phase were optimized by a series o f tests. The results showed that after deacidizing the stone coal acidic leach solution with Na2S203, the extraction of vanadium and molybdenum can reach 84.1% and 81.1%, respectively. The stripping of vanadium can reach above 99 % using 1.5mol/L H2SO4 as the stripping agent and molybdenum cannot be stripped under this condition. When 60 g/L NHaHCO3 solution was used as the stripping agent, molybdenum can be stripped effectively and the stripping can reach 76.4 %. Vanadium and molybdenum can be separated by using different stripping agent in the process of stripping.