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Effect of crown ethers on the solvent extraction and separation of lanthanide(III) ions with 4-benzoyl-3-methyl-1-phenyl-2-pyrazolin-5-one

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Abstract

Synergistic solvent extraction of 14 lanthanides with mixtures of 4-benzoyl-3-methyl-1-phenyl-2-pyrazolin-5-one (HP) and the crown ethers (S), 18-crown-6, benzo-18-crown-6 or dibenzo-18-crown-6 from an aqueous chloride medium with the constant ionic strength of 0.1 mol dm−3 was investigated using benzene as a diluent. The composition of the species extracted was determined as LnP3 · S. The addition of a crown ether to the chelating extractant produced rather significant synergistic effects. On basis of experimental data, values of equilibrium constants, synergistic coefficients, and separation factors were calculated.

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  1. Department of Inorganic Chemistry, University of Chemical Technology and Metallurgy, 8 Kl. Okhridski, 1756, Sofia, Bulgaria

    Maria A. Petrova & Ivan L. Dukov

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  1. Maria A. Petrova
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  2. Ivan L. Dukov
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Correspondence to Ivan L. Dukov.

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Petrova, M.A., Dukov, I.L. Effect of crown ethers on the solvent extraction and separation of lanthanide(III) ions with 4-benzoyl-3-methyl-1-phenyl-2-pyrazolin-5-one. Chem. Pap. 62, 207–214 (2008). https://doi.org/10.2478/s11696-008-0012-4

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  • DOI: https://doi.org/10.2478/s11696-008-0012-4

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