Extraction of Actinides and Lanthanides from Nitric Acid Solutions with Mixtures of 1,5-N,N'-Bis[(Diphenylphosphoryl)Acetyl(Hexyl)Amino]pentane and New Asymmetrical Phosphonium- and Imidazolium-Based Ionic Liquid

IF 1.8 3区化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR Russian Journal of Inorganic Chemistry Pub Date : 2024-07-03 DOI:10.1134/s0036023623602933

A. N. Turanov, V. K. Karandashev, E. V. Sharova, O. I. Artyushin

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Abstract

A new dicationic ionic liquid, 1-methyl-3-(4-(tributylphosphonio)butyl)-1H-imidazol-3-ium di[bis(trifluoromethanesulfonyl)imide] [ImP][Tf₂N]₂, showing high hydrophobicity (solubility in water is 9.2 × 10^–4 mol/L) has been synthesized. The extraction of U(VI), Th(IV), and lanthanides(III) from nitric acid solutions with mixtures of 1,5-N,N'-bis[(diphenylphosphoryl)acetyl(hexyl)amino]pentane (L) containing two bidentate Ph₂P(O)CH₂C(O)N(Hex)- fragments connected by pentamethylene spacer through amide nitrogen atoms and [ImP][Tf₂N]₂ in 1,2-dichloroethane (DCE) has been studied. During the extraction of metal ions in this system, a significant synergistic effect has been observed. The influence of the composition of aqueous and organic phases on the efficiency of metal ions extraction into organic phase has been considered and the stoichiometry of extracted complexes has been determined. The synergistic effect in the extraction of Ln(III) from 3 M HNO₃ solutions with a mixture of L and [ImP][Tf₂N]₂ in DCE is an order of magnitude higher than in the L–[C₈mim][Tf₂N]–DCE system.

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用 1,5-N,N'-双[(二苯基磷酰)乙酰基(己基)氨基]戊烷与新型不对称膦基和咪唑基离子液体的混合物从硝酸溶液中萃取锕系元素和镧系元素

摘要合成了一种新的双阳离子液体--1-甲基-3-(4-(三丁基膦酰)丁基)-1H-咪唑-3-鎓二[双(三氟甲烷磺酰基)亚胺][ImP][Tf2N]2，它具有很高的疏水性（在水中的溶解度为 9.2 × 10-4 mol/L）。用 1,5-N、N'-双[(二苯基磷酰)乙酰(己基)氨基]戊烷 (L) 的混合物进行了萃取。在该体系中萃取金属离子时，观察到了显著的协同效应。研究考虑了水相和有机相的组成对金属离子萃取到有机相的效率的影响，并确定了萃取络合物的化学计量学。与 L-[C8mim][Tf2N]-DCE 体系相比，L 和[ImP][Tf2N]2 的混合物在 DCE 中从 3 M HNO3 溶液中萃取 Ln(III) 的协同效应要高出一个数量级。

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来源期刊

Russian Journal of Inorganic Chemistry 化学-无机化学与核化学

CiteScore

3.10

自引率

38.10%

发文量

237

审稿时长

3 months

期刊介绍： Russian Journal of Inorganic Chemistry is a monthly periodical that covers the following topics of research: the synthesis and properties of inorganic compounds, coordination compounds, physicochemical analysis of inorganic systems, theoretical inorganic chemistry, physical methods of investigation, chemistry of solutions, inorganic materials, and nanomaterials.