Journal
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
Volume 261, Issue 2, Pages 357-363Publisher
SPRINGER
DOI: 10.1023/B:JRNC.0000034871.59862.76
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Solvent extraction of Pr(III) and Th(IV) has been investigated with commercial extractants of CYANEX 301 (bis(2,4,4-trimethylpentyl) dithiophosphinic acid) and CYANEX 302 (bis(2,4,4-trimethylpentyl) monothiophosphinic acid) in kerosene from nitrate medium. The effects of various parameters affecting the extraction equilibrium of Th(IV) and Pr(III), including temperature, were studied and the stoichiometry of the extracted Th(IV) and Pr(III) species was elucidated. The separation of Th(IV) from Pr(III) depending on the difference in the extraction behavior of the two extractants towards these metals is given and discussed.
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