Investigation of Di-(2-Ethylhexyl)phosphoric Acid in Extraction System Used in Centrifugal Semicounterflow Extractors of Therapeutic Yttrium-90

  • A. Yu. Tsivadze
  • A. T. FilyaninEmail author
  • O. A. Filyanin
  • N. A. Danilov


The method of distribution of di-(2-ethylhexyl)phosphoric acid between dodecane, isooctane, hexane, and five-molar hydrochloric acid is studied to remove the acid from the yttrium-90 back-extract to the fullest extent possible. The additional washing of the back-extract with these solvents was suggested, and, for this purpose, a special single-stage centrifugal extractor with a mobil light phase was developed. The amount of yttrium-90 in the final product was determined by the electrolytic method. The extraction-spectrophotometric method was used to evaluate low concentrations of di-(2-ethylhexyl)phosphoric acid in an aqueous phase.

Key words:

extraction solvent centrifugal generator yttrium-90 strontium-90 di-(2-ethylhexyl)phosphoric acid 



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Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  • A. Yu. Tsivadze
    • 1
  • A. T. Filyanin
    • 1
    Email author
  • O. A. Filyanin
    • 1
  • N. A. Danilov
    • 1
  1. 1.Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of SciencesMoscowRussia

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