Abstract: In this paper, nickel ion and cobalt ion were separated from multimetal ionic solution system using P507/P204 as extraction agent by different two separation process. The extraction process parameters were calculated according to the theory of multistage countercurrent extraction, and the extraction experiment of two different processes were carried out based on the calculated process parameters, the results show that the raw liquid was extracted with P507 at first, the nickel ion was separated from multiple metal ion raw solution and the recovery rate value was up to 99.69%, the recovery rate of cobalt was 98.19%, when the raw liquid was extracted with P204 at first, nickel and cobalt were separated from the raw liquid at simultaneously and then P507 was used to separate nickel and cobalt, by this method, the recovery rate of nickel was 98.39%, the recovery rate of cobalt was 96.59%. Therefore, high recovery rate of nickel and cobalt could be obtained when P507 as extraction agent was used to separate nickel ion from multimetal ion solution initially. 

Key words: P507, P204, Extraction, Nickel ion, Cobalt ion, Recovery ratio

摘要： 研究分析了以P 5 0 7和P 2 0 4作为萃取剂从多金属离子溶液中分离镍钴的两种工艺方法, 根据多级逆流
萃取理论确定了相应的参数, 通过实验对两种工艺流程的萃取效果进行了对比分析。结果表明: 先以P 5 0 7为萃取剂
把镍离子从溶液中分离出来, 再以P 2 0 4为萃取剂将萃余液中的钴离子回收, 得到镍离子的回收率为9 9. 6 9%, 钴离子
的回收率为9 8. 1 9%; 先以P 2 0 4为萃取剂将镍、 钴离子同时与其他金属离子相分离, 再以P 5 0 7为萃取剂分离镍、 钴离
子, 得到镍离子的回收率为9 8. 3 9%, 钴离子的回收率为9 6. 5 9%。因此, 采用P 5 0 7先萃取分离镍的工艺流程可以得到
较高的镍钴回收率。

关键词: P 5 0 7 ,  P 2 0 4 ,  萃取 , 镍离子 , 钴离 子 ,  , 回收率