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New extractants for reprocessing of spent Th-U fuel

Extraction of U(VI) and Th(IV) from nitric acid media by Di(2-ethylhexyl)sulfoxide (DEHSO)

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Abstract

A study on solvent extraction of U(VI), Th(IV) and HNO3 from nitric acid media by DEHSO is described. Extraction coefficients of U(VI), Th(IV) and HNO3 as a function of aqueous HNO3 concentration, extractant concentration and temperature have been studied. From the data the compositions of extracted species, equilibrium constants and enthalpies of extraction reaction have been evaluated. Back-extraction of U(VI) and Th(IV) from the organic phase by dilute nitric acid has also been tested. All studies on DEHSO are compared with TBP.

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Authors and Affiliations

  1. Shanghai Institute of Nuclear Research, Academia Sinica, Shanghai, (China)

    Bao Bo-Rong, Bao Ya-Zhi, Shen Chao-Hong, Wang Gao-Dong & Qian Jun

  2. Chemistry Department, Suzhou University, Suzhou, (China)

    Cao Zheng-Bai

Authors
  1. Bao Bo-Rong
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  2. Bao Ya-Zhi
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  3. Shen Chao-Hong
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  4. Wang Gao-Dong
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  5. Qian Jun
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  6. Cao Zheng-Bai
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Bo-Rong, B., Ya-Zhi, B., Chao-Hong, S. et al. New extractants for reprocessing of spent Th-U fuel. Journal of Radioanalytical and Nuclear Chemistry, Articles 162, 391–398 (1992). https://doi.org/10.1007/BF02035399

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  • DOI: https://doi.org/10.1007/BF02035399

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