P204萃取Co(Ⅲ)动力学的研究  

Study of Kinetics on Extraction of Co(Ⅲ) with P204

作　　者：钱东[1] 蔡春林[1] 王开毅[1] 刘菊红[1] 陈小毅[1] 赖德勇[1] 

机构地区：[1]中南大学化学化工学院,长沙410083

出　　处：《稀有金属》2002年第1期73-75,共3页Chinese Journal of Rare Metals

基　　金：湖南省自然科学基金资助 ( 99JJY2 0 0 10 )

摘　　要：研究了氨性体系中二 (2 乙基己基 )磷酸 (P2 0 4)萃取Co(Ⅲ )的动力学 ,经过P2 0 412h的萃取 ,Co(Ⅲ )的萃取率为 10 8% ,证实了 [Co(NH3 ) 6]3 + 是一种动力学惰性配合物。因此 ,可采用P2 0 4通过非平衡溶剂萃取将Co(Ⅱ )以Co(Ⅲ )的形式与Ni(Ⅱ )或Cu(Ⅱ )分离 ,Co(Ⅲ )、Ni(Ⅱ )的分离系数为 378,Co(Ⅲ )、Cu(Ⅱ )的分离系数达到 90 8。The kinetics on extraction of [Co(NH 3) 6] 3+ with di(2 ethylhexyl) phosphate(P204) in the ammoniacal solution were studied. The percentage extraction of [Co(NH 3) 6] 3+ is about 10.8% only after 12 h extraction with P204. It was proved that [Co(NH 3) 6] 3+ is an inert complex in the kinetics. Therefore, Co(Ⅱ) can be separated as the form of [Co(NH 3) 6] 3+ with Ni(Ⅱ) or Cu(Ⅱ) by non equilibrium solvent extraction with P204. The separation factor of [Co(NH 3) 6] 3+ and Ni(Ⅱ) attains to 378 and the separation factor of [Co(NH 3) 6] 3+ and Cu(Ⅱ) attains to 908.

关 键 词：P204 钴 非平衡溶剂萃取 动力学 萃取剂 

分 类 号：TF816[冶金工程—有色金属冶金]