Chinese Journal of Applied Chemistry ›› 1989, Vol. 0 ›› Issue (6): 22-26.

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EXTRACTION OF THORIUM WITH 4, 4'-NONANEDIOYL-BIS-(1-PHENYL-3-METHYL-5-PYRAZOLONE)(H2A)

Yuan Liming, Song Wenjun   

  1. Department of Chemistry, Yunnan University, Kunming
  • Received:1988-11-30 Revised:1989-06-30 Published:1989-12-10 Online:1989-12-10

Abstract: The extraction of thorium in nitric acid by H2A-CHCl3 solution has been studied. Theextraction equilibrium constant is found to be 1.03×106. The pH1/2 of Th(Ⅳ), Fe(Ⅲ),Co(Ⅱ), Ni(Ⅱ), Zn(Ⅱ), Cu(Ⅱ), Pb(Ⅱ), U(Ⅵ), La(Ⅲ) and Yb(Ⅲ) in nitric acid by H2A-CHCl3 are determined. A method for separating Th(Ⅳ) in monazite is proposed.

Key words: Extraction, Thorium, Pyrazolidone, Metal ion chelating agent