Chinese Journal of Applied Chemistry ›› 1993, Vol. 0 ›› Issue (4): 72-74.

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EXTRACTION OF RARE-EARTH IONS(Ⅲ) WITH BIS(2,4,4-TRIMETHYLPENTYL) PHOSPHINIC ACID

Zhang Xiaofeng, Li Deqian   

  1. Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022 Changchun
  • Received:1992-08-10 Revised:1992-12-16 Published:1993-08-10 Online:1993-08-10

Abstract: The extraction behavior of trivalent rare-earth ions (except Sc, Pm) in hydrochloric acid solution using a n-octane solution containing his(2,4,4-trimethylpentyl) phosphinic acid(HBTMPP) was studied. The mean separation factor (βzz+1) for the system was found to be 3.24. The system showed an advantage of higher selectivity and easier stripping ever that With HEH/EHP. The extraction mechanism for Er(Ⅲ) and Tm(Ⅲ) ions has been investigated by the method,of solpe analysis.The equilibrium constants of the extraction have been calculated and the IR and 1H NMR spectra of the Er (Ⅲ) complex have been discussed.

Key words: bis(trimethylpentyl) phosphinic acid, rare earth ions(Ⅲ), extraction