Influence of Ionic Liquid on the Extraction of Actinides and Lanthanides(III) with Phosphorylureas from Nitric Acid Solutions

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Abstract

The effect of the ionic liquid 1-butyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide on the extraction of U(VI), Th(IV) and lanthanides(III) from nitric acid solutions with phosphorylureas RR'P(O)NHC(O)NHC8H17 n differing in the nature of the substituents at the phosphorus atom was studied. A significant synergistic effect was discovered during the extraction of metal ions in the presence of an ionic liquid in the organic phase. The stoichiometry of the extracted complexes was determined. The influence of the structure of the extractant, the nature of the organic diluent, and the concentration of HNO3 in the aqueous phase on the efficiency of the extraction of metal ions into the organic phase is considered.

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A. N. Turanov

Osipyan Institute of Solid State Physics of the Russian Academy of Sciences

Author for correspondence.
Email: v_brel@mail.ru
Russian Federation, Chernogolovka

V. K. Karandashev

Institute of Microelectronics Technology and High Pure Materials of the Russian Academy of Sciences

Email: v_brel@mail.ru
Russian Federation, Chernogolovka

E. I. Goryunov

Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences

Email: v_brel@mail.ru
Russian Federation, Moscow

I. B. Goryunova

Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences

Email: v_brel@mail.ru
Russian Federation, Moscow

V. K. Brel

Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Sciences

Email: v_brel@mail.ru
Russian Federation, Moscow

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Supplementary files

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2. Fig. 1. Dependence of the distribution coefficients U(VI) on the concentration of HNO3 in the equilibrium aqueous phase during extraction with 0.01 M solutions of compounds 1-4 in chloroform

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3. Fig. 2. Dependence of the distribution coefficients of Th(IV) on the concentration of HNO3 in the equilibrium aqueous phase during extraction with 0.01 M solutions of compounds 1-4 in chloroform

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4. Fig. 3. Dependence of the distribution coefficients Th(IV) (1-3) and U(VI) (4-6) on the concentration of HNO3 in the equilibrium aqueous phase during extraction with 0.003 M solutions of compounds 1 (1, 5), 2 (3, 6) and 3 (2, 4) in chloroform containing 0.1 mol/L bmimTf2N

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5. Fig. 4. Distribution coefficients of Ln(III) upon extraction with 0.05 M solutions of compounds 1 (1, 3), 2 (2, 5), 3 (4, 6) and 4 (7) in chloroform (3, 5, 6) and in chloroform containing 0.1 mol/l bmimTf2N (1, 2, 4, 7), from a 3 M HNO3 solution

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6. Fig. 5. Dependence of the distribution coefficients Eu(III) (1, 4), La(III) (2, 5) and Lu(III) (3, 6) on the concentration of HNO3 in the equilibrium aqueous phase upon extraction with 0.05 M solutions of compound 1 in chloroform (4-6) and in chloroform containing 0.1 mol/L bmimTf2N (1-3)

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7. Fig. 6. Distribution coefficients of Ln(III) upon extraction with 0.02 M solutions of compounds 1 (3, 4, 5) and 5 [29] (1, 2) in dichloroethane (1, 4), chloroform (2, 3) and nitrobenzene (5) containing 0.1 mol/l bmimTf2N, from a 3 M HNO3 solution

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8. Supplementary
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