Journal of Radioanalytical and Nuclear Chemistry

, Volume 314, Issue 2, pp 975–983 | Cite as

Modeling of simultaneous extraction of uranyl nitrate and nitric acid by 36 vol.% tri-iso-amyl phosphate in n-dodecane

  • S. Balasubramonian
  • Pranay Kumar Sinha
  • D. Sivakumar
  • Alok Kumar Mishra
  • M. Sampath
  • N. K. Pandey
  • Shekhar Kumar


The simultaneous extraction of uranyl nitrate and nitric acid by 36 vol.% tri-iso-amyl phosphate (TiAP) in n-dodecane was experimentally studied and modeled. The batch extraction experiments were carried out at low concentration region of aqueous uranyl nitrate by 36 vol.% TiAP in n-dodecane at 25 °C. The non idealities in aqueous phase were described by eNRTL model. The predicted organic phase concentration of nitric acid and uranyl nitrate obtained by considering the HNO3·TiAP and UO2(NO3)2·2TiAP species in the organic phase is in good agreement with the experimental data.


Solvent extraction Uranium Modeling Purex process Thermodynamic model Distribution equilibria 


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2017

Authors and Affiliations

  1. 1.Reprocessing R&D Division, Reprocessing GroupIGCARKalpakkamIndia
  2. 2.Reprocessing Operation Division, Reprocessing GroupIGCARKalpakkamIndia

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