【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。更多还原

【Abstract】 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.更多还原