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Lanthanoid complexes with thenoyltrifluoroacetone and 4-tert-butylcalix[4]arene-tetraacetic acid tetraethyl ester: synergistic extraction and separation |
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| Authors: | Maria Atanassova |
| Institution: | 1. Department of General and Inorganic Chemistry, University of Chemical Technology and Metallurgy, 8 Kliment Okhridski blvd, BG, 1756, Sofia, Bulgaria |
| Abstract: | The solvent extraction of fourteen lanthanoid ions with thenoyltrifluoroacetone (HTTA) in combination with tetraethyl 4-tert-butylcalix4]arene-tetraacetic acid tetraethyl ester (S) from a perchlorate medium at constant ionic strength was investigated. The extracted species were identified as the Ln(TTA)3·S complexes by slope analysis. Equilibrium constants, parameters for extraction, and the synergistic and separation factors between two adjacent Ln(III) ions were determined. The solvent extraction of 14 lanthanoids (Ln) with thenoyltrifluoroacetone (HTTA) in combination with 4-tert-butylcalix4]arene-tetraacetic acid tetraethyl ester (S) is investigated. The composition of the extracted species has been found as Ln(TTA)3·S. The values of the equilibrium constants, the synergistic and separation factors between two adjacent Ln(III) ions have been calculated. |
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