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- Title
Extraction of ytterbium via co-reduction of Al(III) and Yb(III) from LiCl-KCl melt on W electrode.
- Authors
Li, Xing; Yan, Yong-De; Zhang, Mi-Lin; Xue, Yun; Tang, Hao; Zhou, Zhi-Ping; Yang, Xiao-Nan; Zhang, Zhi-Jian
- Abstract
Anhydrous ytterbium chloride was obtained via solid-phase reaction from YbO with AlCl as a chlorination agent. The electrochemical behavior of the chloridized YbO was investigated on W electrodes in LiCl-KCl and LiCl-KCl-AlCl melts by cyclic voltammetry and square wave voltammetry. The results showed that the reduction/reoxidation of Yb(III)/Yb(II) was reversible and controlled by diffusion. The signals related to the formation of two Al-Yb intermetallic compounds were detected in LiCl-KCl-AlCl melt. Potentiostatic electrolysis was carried out in LiCl-KCl-AlCl-YbCl melt on W electrodes at 943 K at different potentials and AlYb, AlYb, AlLi and AlLi phases were detected in deposits. Then, the extraction of ytterbium was performed. The currents evolution was recorded by square wave voltammetry and the extraction efficiency was evaluated via inductive coupled plasma atomic emission spectrometer analysis during electrolysis. The initial extraction rate is much higher than that at longer times. The extraction efficiency was about 98.0 % for Yb(III) after potentiostatic electrolysis for 60 h at −1.84 V in LiCl-KCl-AlCl-YbCl melt.
- Subjects
YTTERBIUM isotopes; CHEMICAL reduction; SOLID phase extraction; ALUMINUM isotopes; TUNGSTEN electrodes; CHLORINATION; CHEMICAL reactions
- Publication
Journal of Radioanalytical & Nuclear Chemistry, 2014, Vol 299, Issue 1, p657
- ISSN
0236-5731
- Publication type
Article
- DOI
10.1007/s10967-013-2785-3