Author： Inoue Sadanobu Zhang Qiangbin Uto Masayuki Minami Hirotsugu
Publisher： Taylor & Francis Ltd
ISSN： 0736-6299
Source： Solvent Extraction and Ion Exchange, Vol.24, Iss.5, 2006-01, pp. : 653-662
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Abstract
We conducted a study on the equilibrium extraction behavior of the trivalent lanthanide ions (M 3+ ), La, Pr, Eu, Ho, and Yb, from tartrate aqueous solutions into chloroform solutions containing N‐p‐methoxybenzoyl‐N‐phenylhydroxylamine (Methoxy‐BPHA, HL) and 1,10‐phenanthroline (phen). The synergistic species extracted was found to be {ML 2 (phen) (HL)} + (1/2)Tar 2− , where Tar 2− is tartrate ion. The extraction constants were calculated. The extraction separation behavior and extractability of lanthanides are discussed in comparison with the self‐adducted chelate, ML 3 (HL) 2 , which was extracted in the absence of phen, and synergistic extraction by mixtures of other extractants such as 2‐thenoyltrifluoroacetone, and neutral donors.
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