Cation exchange extraction of neptunium(V) and protactinium(V) from molten nitrate salt

T. Mitsugashira, Shigeru Suzuki

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1 Citation (Scopus)

Abstract

Cu-di-(2-ethylhexyl)phosphate was used as the cation exchange extractant from molten nitrate salt. IR absorption spectra of di-(2-ethylhexyl)phosphoric acid and Cu-di-(2-ethylhexyl)phosphate were compared and it was proved that the acidic form of the extractant is not Cu-di-(2-ethylhexyl)-phosphate. Using LiNO3-NH4NO3 eutectic melt, it was shown that the back-extraction of Cu2+ is a cation exchange reaction. Np(V) and Pa(V) were extracted by Cu-di-(2-ethylhexyl)phosphate from LiNO3-NaNO3-KNO3 eutectic melt. The distribution ratio of Np(V) was greater than that of Pa(V) on the contrary of their distribution ratios in the aqueous extraction system. A possible cation exchange extraction reaction was proposed for the extraction of Np(V).

Original languageEnglish
Pages (from-to)309-317
Number of pages9
JournalJournal of Radioanalytical Chemistry
Volume34
Issue number2
DOIs
Publication statusPublished - 1976 Jan 1

ASJC Scopus subject areas

  • Molecular Medicine
  • Radiology Nuclear Medicine and imaging

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