【摘要】 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/Sc⁰,相对标准自由能△G_RE/Sc⁰,相对标准熵变△S_RE/Sc⁰.应用于混合稀土中钪的分离,方法简便快速,结果准确可靠.更多还原

【Abstract】 In this paper,the distribution coefficient K_d of rare earth elements and the separation coefficient β_RE^Sc of scandium vs.other rare earth elements at different temperatures in the medium of D_201S-（NH₄）₂SO₄ were determined.The equilibrium constants of the ion ex- change reactions and their △H,,△G,△ were also calculated.With the ther- modynamical data the partition and separation behaviour of rare earth elements were ex- plained.It was applied in the separation of scandium-europium and that of scandium in the mixed rare earths,the recovery of scandium is in the range of 99.12%～99.31%, the recovery of europium in 99.10%～99.23% and that of the mixed rare earths in 99.19%～99.60%.This method is very simple,covenient and rapid with the accurate and reliable results.更多还原