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Synergistic extraction of alkaline earth cations with 3-phenyl-4-benzoyl-isoxazol-5-one and tri-n-octylphosphine oxide in toluene

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Abstract

The synergistic extraction of alkaline earth cations from 1M NaNO3 aqueous solutions with 3-phenyl-4-benzoylisoxazol-5-one (HPBI) and tri-n-octylphosphine oxide (TOPO) in toluene at 25°C has been studied. The extraction efficiency follows the order Ba2+<Sr2+<Ca2+<Mg2+, which is the same as that previously observed with 1-phenyl-3-methyl-4-benzoyl-pyrazol-5-one (HPMBP). The extraction occurs at a lower pH range than with HPMBP because of the higher acidity of HPBI. The extracted species are M(PBI)2(TOPO) x withx=2 for M=Mg, Ca, Sr and Ba (logK 1,2,2=3.91, 1.18 and 0.29 respectively) and withx=3 for M=Sr and Ba (logK 1,2,3=3.28 and 2.07 respectively).

The strong interactions which occur between HPBI and TOPO (logK int=1.84) have been considered in the extraction constant calculations.

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Authors and Affiliations

  1. Laboratoire de Chimie Minérale et Analytique E. H. I. C. S., C. N. R. S. (URA 405), 1, rue Blaise Pascal, F-67008, Strasbourg Cedex, (France)

    A. Messaoudi, K. Torkestani, G. Goetz-Grandmont & J. P. Brunette

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  1. A. Messaoudi
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  2. K. Torkestani
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  3. G. Goetz-Grandmont
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  4. J. P. Brunette
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Messaoudi, A., Torkestani, K., Goetz-Grandmont, G. et al. Synergistic extraction of alkaline earth cations with 3-phenyl-4-benzoyl-isoxazol-5-one and tri-n-octylphosphine oxide in toluene. Journal of Radioanalytical and Nuclear Chemistry, Articles 208, 123–132 (1996). https://doi.org/10.1007/BF02039754

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  • DOI: https://doi.org/10.1007/BF02039754

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