EXTRACTION MECHANISM OF CERIUM(IV) AND FLUORINE(I)IN THE SEPARATION PROCESS OF BASTNASITE LEACHSOLUTION BY CYANEX 923
来源期刊：Acta Metallurgica Sinica2001年第1期
论文作者：D.Q.Li W.P.Liao G.H.Yu
Key words：solvent extraction; Ce(IV); F(I); Cyanex 923;
Abstract: The extraction equilibrium of cerium(IV) and fiuoriue(l) from II2SO4 solution tyCyanex 923 was studied. The extraction mechanism of Ce(IV) and F(I) by Cyanex923 was determined by the method of slope analysis. The results showed that Cyane923 can extract HF as HF.L and Ce4+ together with HF as Ce(HF)(HSO4)2(SO4).2Lby which HF comes into the organic phase mainly when there is Ce4+ in the solution,where L is the extractant. Temperature did not affect the extraction. The IR spectraof purified Cyanex 923 saturated with Ce(IV) and HF were discussed.``
D.Q.Li1，W.P.Liao1，G.H.Yu1
(1.Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, The ChineseAcademy of Sciences, Changchun 130022, China)
Abstract:The extraction equilibrium of cerium(IV) and fiuoriue(l) from II2SO4 solution tyCyanex 923 was studied. The extraction mechanism of Ce(IV) and F(I) by Cyanex923 was determined by the method of slope analysis. The results showed that Cyane923 can extract HF as HF.L and Ce4+ together with HF as Ce(HF)(HSO4)2(SO4).2Lby which HF comes into the organic phase mainly when there is Ce4+ in the solution,where L is the extractant. Temperature did not affect the extraction. The IR spectraof purified Cyanex 923 saturated with Ce(IV) and HF were discussed.``
Key words:solvent extraction; Ce(IV); F(I); Cyanex 923;
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