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Synergistic extraction of U(VI) and Th(IV) from nitric acid with 4-benzoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-thione (HBMPPT) and tri-n-octylphosphine oxide (TOPO) in toluene

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Abstract

The extractant HBMPPT (4-benzoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-thione) was synthesized from HBMPP. Its m.p. was 106–108°C. The synergistic extraction of U(VI) and Th(IV) from nitric acid solution by HBMPPT and TOPO in toluene was studied. The extraction ability of HBMPPT was not so high as that of its parent (HBMPP), but when a little tri-n-octylphosphine oxide (TOPO) was added the ability to extract U(VI) and Th(IV) was seriously improved. The synergistic extracted complexes may be presented as UO2NO3·BMPPT·TOPO and UO2(BMPPT)2·TOPO for U(VI), and Th(NO3)3·BMPPT·TOPO and Th(NO3)2(BMPPT)2·TOPO for Th(IV) respectively.

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Authors and Affiliations

  1. Institute of Nuclear Research, 201800, Shanghai, China

    Shaoning Yu, Li Ma & Borong Bao

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  1. Shaoning Yu
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  2. Li Ma
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  3. Borong Bao
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Yu, S., Ma, L. & Bao, B. Synergistic extraction of U(VI) and Th(IV) from nitric acid with 4-benzoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-thione (HBMPPT) and tri-n-octylphosphine oxide (TOPO) in toluene. J Radioanal Nucl Chem 240, 219–221 (1999). https://doi.org/10.1007/BF02349157

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  • DOI: https://doi.org/10.1007/BF02349157

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