Abstract
The extraction of REE(III), U(VI), and Th(IV) from nitric acid solutions with solutions of diphenyl(dibutylcarbamoylmethyl)phosphine oxide considerably increases in the presence of ionic liquids with the bis[(trifluoromethyl)sulfonyl]imide anion and quaternary ammonium cations. The stoichiometry of the extractable complexes was determined. The influence of the HNO3 concentration in the aqueous phase, of the cation in the ionic liquid, and of the organic diluent on the efficiency of the extraction of REE(III), U(VI), and Th(IV) ions was examined.
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The study was made within the framework of the government assignment for the Institute of Solid State Physics, Institute of Microelectronics Technology and High Purity Materials, and Institute of Physiologically Active Compounds (all Russian Academy of Sciences).
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The authors declare that they have no conflict of interest.
Russian Text © The Author(s), 2019, published in Radiokhimiya, 2019, Vol. 61, No. 6, pp. 489–494.
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Turanov, A.N., Karandashev, V.K., Yarkevich, A.N. et al. Extraction of REE(III), U(VI), and Th(IV) from Nitric Acid Solutions with Diphenyl(dibutylcarbamoylmethyl)phosphine Oxide in the Presence of Quaternary Ammonium Bis[(trifluoromethyl)sulfonyl]imides. Radiochemistry 61, 694–699 (2019). https://doi.org/10.1134/S1066362219060092
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DOI: https://doi.org/10.1134/S1066362219060092