Effect of the Structure of Phosphoryl-Containing Podands on the Extraction of Actinides and Lanthanides(III) from Nitric Acid Solutions

The extraction of U(VI), Th(IV), Am(III), and lanthanide(III) ions and HNO 3 from nitric acid solutions with 1,2-dichloroethane solutions of 3-oxapentane-1,5-diylbis(diphenylphosphine)dioxide and its structural analogues was studied. The stoichiometry of the extractable complexes was determined. The...

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Bibliographic Details
Published in:Russian journal of general chemistry 2022-11, Vol.92 (11), p.2290-2296
Main Authors: Turanov, A. N., Karandashev, V. K., Baulin, V. E., Baulin, D. V., Kostikova, G. V., Fedoseev, A. M.
Format: Article
Language:English
Subjects:
Actinides
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Dichloroethane
Efficiency
Lanthanides
Nitric acid
Stoichiometry
Thorium
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Summary:The extraction of U(VI), Th(IV), Am(III), and lanthanide(III) ions and HNO 3 from nitric acid solutions with 1,2-dichloroethane solutions of 3-oxapentane-1,5-diylbis(diphenylphosphine)dioxide and its structural analogues was studied. The stoichiometry of the extractable complexes was determined. The effects of the extractant structure and HNO 3 concentration in the aqueous phase on the efficiency of the metal ions extraction into the organic phase were considered. The successive replacement of two methylene groups connecting the ether oxygen atom with Ph 2 P(O) groups in the podand molecule by o -phenylene groups leads to an increase in the efficiency of Th(IV) Am(III), and Ln(III) extraction from nitric acid solutions, but has little effect on the efficiency of U(VI) extraction.
ISSN:1070-3632
1608-3350
DOI:10.1134/S1070363222110135