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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. shu

Separation of Rare Earth Elements from Their Binary Oxide Mixtures via Chemical Vapor Transport Reaction

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a Department of Metallurgy, Hebei Institute of Technology, Tangshan 063009;
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b Department of Chemistry, Northeastern University, Shenyang;
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c Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang

Corresponding author: SUN Yan-Hui,
Received Date: 18 September 2002
Available Online: 24 February 2003
Fund Project: 国家自然科学基金(5957402059874008) (5957402059874008)

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 LnAl₃Cl_3n+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 SF_Er/Ho=1.41,SF_Er/Tm=1.60,SF_Tm/Yb=1.91,SF Lu/Yb=1.37.
- rare earth oxide,
- chemical vapor transport reaction,
- separation,
- rare earth vapor complexes
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