Extraction of Ce^(4+) from Tervalent Lanthanide with Immobilized Interface in a Microporous Hollow Fiber

中空纤维膜（ＭＨＦ）法研究了Ｃｅ４＋和三价稀土的溶剂萃取．结果表明Ｃｅ４＋的传质系数是Ｃｅ３＋和Ｌａ３＋的１０倍以上．Ｃｅ４＋的传质速度受水相临界层中扩散速度控制，ＲＥ３＋的传质速度受膜内扩散控制．Ｃｅ４＋能够从三价稀土中有效地分离．

The solvent extraction of Ce 4+ and tervalent lanthanide was studied by the method of microporous hollow fiber(MHF) extraction. The results showed that the mass transfer coefficient of Ce 4+ was larger about 10 times than these of Ce 3+ and La 3+ . The mass transfer rate of Ce 4+ was controlled by its dispersion in the critical layer of the water phase. That of RE 3+ was controlled by its dispersion in the membrane. Ce 4+ could be effectively separated from the rare earth solution.