摘要：采用皂化2－乙基己基磷酸单2－乙基己基酯（P507）与萃取剂磷酸三丁酯（TBP）和溶剂煤油构成微乳液膜体系对水相中的 Co2+进行萃取研究,考察了微乳液中P507浓度、萃原液初始浓度及pH、萃取时间和相比对Co2 +萃取率的影响。实验结果表明,当萃原液初始浓度为0.05mol/ L,外水相pH为2，微乳液中P507的体积比为10%,相比V (o)∶V (a) =2∶1， 萃取时间为10min时, 对钴萃取的效果比较理想，Co2+的萃取率达到98%以上。

关键词：皂化；微乳液；钴提取

Abstract : introduced by the reaction mechanism of saponified P507 - TBP microemulsion system extraction cobalt in the water extracting，It studies that the bioburden initial concentration， the concentration of  saponified P507， bioburden initial pH，the extracting time，compared to cobalt extraction ratio influence。The experimental results show that，when Initial concentration of liquid extract are 0.05mol / L,pH value of the external phase are two,the volume ratio of P507 in the microemulsion are 10%, compared to V (o): V (a) equal 2: 1, and extraction time are ten minutes, the effect of extraction is quite ideal, and extraction rate of Co2+ can be to more than 98%.

Keywords:  saponify ; microemulsion ; extraction cobalt