轻稀土分离研究进展

Progress of separation of light rare earth elements

阐述了国内外对La、Ce、Pr、Nd、Po、Sm、Eu 7种轻稀土金属的分离与提纯技术的进展情况,介绍了目前主要的分离方法——分布结晶法、溶剂萃取法、离子交换法、萃取色层法、液膜法。对各种方法进行分类与讨论,并指出了现存方法的优缺点,最后对今后的发展趋势做了简单评述。

The progress of separation and purification of seven light rare earth metals （ La, Ce, Pr, Nd, Po, Sm, Eu） at home and abroad is reviewed. The main separation methods, including fractional crystallization, solvent extraction, ion exchange method, extraction chromatograph method and liquid membranes are introduced. The classification and discussion for each method are performed. The advantages and disadvantages of current methods are pointed out. The development trend in the future is finally proposed.