Abstract

Interphase distribution of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and Y between aqueous HNO₃ solutions and solutions of binary extractants obtained by reaction of equimolar amounts of dialkylamino derivatives of carbamoylmethylphosphine oxides and dinonylnaphthalenesulfonic acid in organic solvents has been studied. Stoichiometry of extracted complexes has been determined, effect of HNO₃ concentration in aqueous phase and organic solvent nature on the efficiency of metal ion recovery into organic phase has been considered. On the formation of extractable REE(III) complexes, the cationic moiety of binary extractant provides coordination solvation of REE(III) ions, while anionic moiety offers their high hydrophobicity, which favors to the efficient transition of metal ions into organic phase.

中文翻译：

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基于氨基甲酰基甲基膦氧化物和二壬基萘磺酸的二烷基氨基衍生物的二元萃取剂从硝酸溶液中萃取稀土元素（III）

摘要

La，Ce，Pr，Nd，Sm，Eu，Gd，Tb，Dy，Ho，Er，Tm，Yb，Lu和Y的相间分布在HNO ₃水溶液和等摩尔量的HNO ₃反应得到的二元萃取剂溶液之间研究了氨基甲酰基甲基氧化膦的二烷基氨基衍生物和二壬基萘磺酸的有机溶剂。已确定提取物的化学计量，HNO _3的作用已经考虑了水相的浓度和有机溶剂的性质对金属离子回收进入有机相的效率的影响。在形成可萃取的REE（III）配合物时，二元萃取剂的阳离子部分提供REE（III）离子的配位溶剂化，而阴离子部分则提供其高疏水性，这有利于金属离子有效转变为有机相。