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Citation: Li Shengchong, Dai Gangfu, Zou Zhongjie, Xu Guangxian. STUDY ON THE SYNERGIC EXTRACTION OF RE(Ⅲ) IONS WITH HTTA-TBPO BY THE METHOD OF TWO-PHASE TITRATION[J]. Chinese Journal of Applied Chemistry, ;1985, 2(4): 71-75. shu

STUDY ON THE SYNERGIC EXTRACTION OF RE(Ⅲ) IONS WITH HTTA-TBPO BY THE METHOD OF TWO-PHASE TITRATION

1.
Department of Chemistry, Beijing University

Corresponding author: Li Shengchong,
Received Date: 15 November 1984
Available Online: 9 March 1985

The extraction system of RE(Ⅲ) (except Pm,including Y) with thenoyltriflouroacetone (HTTA) and tributylphosphine oxide (TBPO) was studied by two-phase titration method.The results showed that:(1) There is no association between HTTA and TBPO under experimental conditions. (2) The mixed ligand complexes of types RE (TTA)₃ (TBPO)₂, RE(TTA)₃(TBPO)₃, RE (TTA)₃(TBPO)₄ were formed in the organic phase and their stability constants were determined. (3) The stability constants β_30k of RE(TTA)₃(TBPO)_k increase with the atomic number of the lanthanide. logβ₃₀₃ shows a clear tetrad effect.The position of logβ₃₀₃ for Y is between that for Ho and Er.
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