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/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.
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)-(NH_4)_2SO_4 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.
出处
《沈阳化工学院学报》
1992年第3期188-198,共11页
Journal of Shenyang Institute of Chemical Technolgy
基金
沈阳化工学院青年科学基金
关键词
稀土族
离子交换树脂
热力学
rare earth elements
anion-exchange resin D_(201s)
thermodynamic
