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Chemical studies on uranium extraction from concentrated phosphoric acid by using PC88A and DBBP mixture

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Abstract

Liquid–liquid extraction of U (VI) from concentrated phosphoric acid by using (2-ethyl hexyl) phosphonic acid, mono (2-ethyl hexyl) ester (PC88A) and di-butyl butyl phosphonate (DBBP) has been investigated. The effect of different factors affecting the extraction process (PC88A concentration, DBBP concentration, shaking time, aqueous/organic phase ratio, phosphoric acid concentration and effect of diluents) have been investigated. The obtained data of temperature on the extraction showed that the enthalpy change is −17.15 kJ mol−1. Uranium was extracted from the strip liquor by using di (2-ethylhexyl) phosphoric acid and tri-octyl phosphine oxide mixture and finally converted to a high purity UO3 product using precipitation with hydrogen peroxide and heat treatment at 365 °C.

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Acknowledgment

The authors wish to thank Dr. H. S. Gado Head of phosphoric acid pilot plant for his valuable help in carrying out the test work.

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Authors and Affiliations

  1. Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt

    Ahmed A. Abdel-Khalek

  2. Nuclear Materials Authority, Cairo, Egypt

    M. M. Ali & A. F. Abdel-Magied

  3. Chemistry Department, Faculty of Science, El-Fayoum University, El-Fayoum, Egypt

    Radwa M. Ashour

Authors
  1. Ahmed A. Abdel-Khalek
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  2. M. M. Ali
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  3. Radwa M. Ashour
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  4. A. F. Abdel-Magied
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Correspondence to Radwa M. Ashour.

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Abdel-Khalek, A.A., Ali, M.M., Ashour, R.M. et al. Chemical studies on uranium extraction from concentrated phosphoric acid by using PC88A and DBBP mixture. J Radioanal Nucl Chem 290, 353–359 (2011). https://doi.org/10.1007/s10967-011-1372-8

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  • DOI: https://doi.org/10.1007/s10967-011-1372-8

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