Mextral 984H从页岩提钒浸出液中萃取V(Ⅴ)的研究

Extraction of Vanadium (Ⅴ) from Shale Leaching Solution with Mextral 984H

考察Mextral 984H螯合萃取体系下料液相pH、相比、萃取剂浓度、萃取时间对钒和杂质离子铁、铝、镁、钾、磷的萃取率的影响。结果表明:在料液pH=1.0、萃取时间20 min、相比O/A=1/2、萃取剂浓度20%、稀释剂为磺化煤油的条件下,酸浸液中钒一级萃取率为79.43%,二级萃取率达到99.06%,且杂质铁、铝、镁、钾和磷的萃取率均低于2%。Mextral 984H通过羟基和肟基共同作用螯合萃取V(Ⅴ),实现了高酸多杂页岩提钒浸出液中钒的高效分离提取。

Effects of pH value,phase ratio,extractant Mextral 984H concentration and extraction time on extraction rates of vanadium and impurity ions such as iron,aluminum,magnesium,potassium and phosphorus in Mextral 984H chelating extraction system were investigated.The results show that the first-stage extraction rate of vanadium in simulated acid leaching solution is 79.43%,the two-stage extraction rate is 99.06%and extraction rates of iron,aluminum,magnesium,potassium and phosphorus are all less than 2%,under the optimum conditions including pH value of feed solution of 1.0,extraction time of 20 min,phase ratio of O/A=1/2,extractant Mextral 984H concentration of 20%,and sulfonated kerosene as diluent.Mextral 984H can extract V(Ⅴ)by chelating together with hydroxyl and oxime group.Efficient separation of vanadium from high acid multi-impurity leachate of shale is achieved.