引用本文:
孙艳辉, 王之昌, 郭雷. 化学气相传输法分离二元混合重稀土氧化物[J]. 应用化学,
2003, 20(6): 511-515.
Citation: SUN Yan-Hui, WANG Zhi-Chang, GUO Lei. Separation of Rare Earth Elements from Their Binary Oxide Mixtures via Chemical Vapor Transport Reaction[J]. Chinese Journal of Applied Chemistry, 2003, 20(6): 511-515.
Citation: SUN Yan-Hui, WANG Zhi-Chang, GUO Lei. Separation of Rare Earth Elements from Their Binary Oxide Mixtures via Chemical Vapor Transport Reaction[J]. Chinese Journal of Applied Chemistry, 2003, 20(6): 511-515.
化学气相传输法分离二元混合重稀土氧化物
摘要:
基于不同稀土氯化物在高温与AlCl3生成气态配合物LnAlnCl3n+3的热力学行为不同,利用化学气相传输法研究了二元相邻混合重稀土氧化物Ho2O3-Er2O3、Er2O3-Tm2O3、Tm2O3-Yb2O3和Yb2O3-Lu2O3的分离特性。结果发现,Ho、Er、Tm、Yb和Lu的氯化物大量沉积在800~1050 K的中、低温区。温度愈高,原子序数愈小的稀土氯化物优先沉积,温度愈低,原子序数愈大的稀土氯化物优先沉积。最大分离系数:SFEr/Ho=1.41,SFEr/Tm=1.60,SFTm/Yb=1.91,SFLu/Yb=1.37。
English
Separation of Rare Earth Elements from Their Binary Oxide Mixtures via Chemical Vapor Transport Reaction
Abstract:
Separation of the neighboring rare earth elements from their binary oxide mixtures Ho2O3-Er2O3,Er2O3-Tm2O3,Tm2O3-Yb2O3 and Yb2O3-Lu2O3 has been carried out via the chemical vapor transport reaction based on the difference in thermodynamic characteristics of their vapor complexes LnAl3Cl3n+3.The results show ed that most rare earth chlorides of Ho,Er,Tm,Yb and Lu are deposited in the reactor zone of temperature ranged from 800 to 1050 K.The chlorides of rare earch with small atomic number are preferably deposited in the reactor zone of higher temperature and rice versa.The largest separation factors expressed as molar ratio for the resulting chlorides are SFEr/Ho=1.41,SFEr/Tm=1.60,SFTm/Yb=1.91,SF Lu/Yb=1.37.
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