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New potentialities of the UNEX process using polyheterocyclic diamides

Authors
  • Borisova, N. E.1
  • Korotkov, L. A.1, 2
  • Ivanov, A. V.1
  • Lapka, J.2
  • Paulenova, A.2
  • Belova, E. V.3
  • Stefanovsky, S. V.3
  • Myasoedov, B. F.3
  • 1 Moscow State University, Moscow, Russia , Moscow (Russia)
  • 2 Oregon State University, Corvallis, Oregon, 97331, USA , Corvallis (United States)
  • 3 Russian Academy of Sciences, Frumkin Institute of Physical Chemistry and Electrochemistry, Leninskii pr. 31, korp. 4, Moscow, 119071, Russia , Moscow (Russia)
Type
Published Article
Journal
Radiochemistry
Publisher
Pleiades Publishing
Publication Date
Nov 01, 2016
Volume
58
Issue
6
Pages
606–616
Identifiers
DOI: 10.1134/S1066362216060072
Source
Springer Nature
Keywords
License
Yellow

Abstract

The possibilities of using 2,2′-bipyridine-6,6′-dicarboxamides in modified versions of the UNEX process were examined. The stability constants of complexes of Eu(III), Am(III), Th(IV), U(VI), and Np(V) ions with certain diamides substituted in the amide moiety or pyridine ring in acetonitrile were determined. The logarithms of the stability constants exceeded 7 for Eu(III) and reached 9 for 5f elements. The ability of the selected diamides in nitrobenzene and trifluoromethyl phenyl sulfone (FS-13) diluents to extract Am(III), Th(IV), U(VI), and Eu(III) was studied.

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