P204萃取分离钴镉的实验研究

Study on Separation of Co and Cd Solution by Using P204

研究了P204萃取分离钴离子、镉离子,给出了萃取分离的最佳工艺条件:温度25℃,水相平衡pH值3.5,P204体积分数20%,皂化率0.6。对于镉含量12.62 g/L的钴镉液,O/A 1∶1,五级逆流萃取,可使得萃余钴液中的镉含量小于20 mg/L。

Study on the separation of cobalt, cadmium ion P204 extraction was carried on. The optimum conditions of extraction are ： temperature 25 ℃, phase equilibrium pH value of 3.5, the volume fraction of P204 20%, and saponifi- cation rate 0.6. For cobalt and cadmium solution,when the cadmium content is 12.62 g/L,O/A 1：1 ,the five stage countercurrent extraction,the cadmium content in the raffinate cobalt solution is less than 20 mg/L.