Citation:
Yuan Liming, Song Wenjun. EXTRACTION OF THORIUM WITH 4, 4'-NONANEDIOYL-BIS-(1-PHENYL-3-METHYL-5-PYRAZOLONE)(H2A)[J]. Chinese Journal of Applied Chemistry,
;1989, 6(6): 22-26.
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The extraction of thorium in nitric acid by H2A-CHCl3 solution has been studied. The extraction 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.
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Keywords:
- Extraction,
- Thorium,
- Pyrazolidone,
- Metal ion chelating agent
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