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

  • Ahmed A. Abdel-Khalek
  • M. M. Ali
  • Radwa M. AshourEmail author
  • A. F. Abdel-Magied
Article

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.

Keywords

Uranium Extraction Phosphoric acid Kinetics 

Notes

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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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2011

Authors and Affiliations

  • Ahmed A. Abdel-Khalek
    • 1
  • M. M. Ali
    • 2
  • Radwa M. Ashour
    • 3
    Email author
  • A. F. Abdel-Magied
    • 2
  1. 1.Chemistry Department, Faculty of ScienceBeni-Suef UniversityBeni-SuefEgypt
  2. 2.Nuclear Materials AuthorityCairoEgypt
  3. 3.Chemistry Department, Faculty of ScienceEl-Fayoum UniversityEl-FayoumEgypt

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