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测定了稀土元素在体系中的分配系数 K。及钪对其它稀土元素的分离系数β_(RE)~(Sc);计算了不同温度下离子交换反应的平衡常数及相应的相对标准自由焓△H_(RE/Sc)~0,相对标准自由能△G_(RE/Sc)~0,相对标准熵变△S_(RE/Sc)~0.应用于混合稀土中钪的分离,方法简便快速,结果准确可靠.
The distribution coefficient of rare earth elements in the system was determined. (RE) ~ (Sc) of other rare earth elements were calculated. The equilibrium constants and corresponding relative standard free enthalpies △ H RE / Sc ~ 0 were calculated under different temperatures. The relative standard free energy △ G RE / Sc 0, relative standard entropy change △ S RE / Sc 0 ~. It is applied to the separation of scandium from mixed rare earths. The method is simple and rapid with accurate and reliable results.