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Extraction of uranium(VI) and thorium(IV) from nitric acid solution by N-alkylcaprolactam

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Abstract

Extraction of uranium(VI), thorium(IV) from nitric acid has been studied with N-octylcaprolactam and N-(2-ethyl)hexylcaprolactam. Distribution coefficients of U(VI), Th(IV) and HNO3 as a function of aqueous NHO3 concentration, extractant concentration and temperature have been studied. The compositions of extracted species, thermodynamic parameters of extraction have been evaluated. Third phase formation in extraction of U(VI) has been studied. Back extraction behavior of U(VI) and Th(IV) from the organic phase has also been tested. The results obtained are compared with those obtained by using TBP under the same experimental conditions.

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Authors and Affiliations

  1. Shanghai Institute of Nuclear Research, Academia Sinica, P.O. Box 800-204, Shanghai, (China)

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

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

    Cao Zheng-Bai

Authors
  1. Shen Chao-Hong
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  2. Bao Bo-Rong
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  3. Wang Gao-Dong
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  4. Qian Jun
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  5. Bao Ya-Zhi
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  6. Cao Zheng-Bai
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Chao-Hong, S., Bo-Rong, B., Gao-Dong, W. et al. Extraction of uranium(VI) and thorium(IV) from nitric acid solution by N-alkylcaprolactam. Journal of Radioanalytical and Nuclear Chemistry, Articles 162, 207–216 (1992). https://doi.org/10.1007/BF02035381

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  • DOI: https://doi.org/10.1007/BF02035381

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