Abstract

It was found that combining two bidentate fragments Ph₂P(O)CH₂C(O)NAlk– in the same molecule via an amide atom with an alkylene bridge leads to a noticeable increase in the extraction of U(VI), Th(IV), and REE(III) from nitric acid solutions. The stoichiometry of the complexes being extracted was determined. The influence exerted by the structure of the extractant, HNO₃ concentration in the aqueous phase, and nature of an organic solvent on the efficiency of extraction of U(VI), Th(IV), and REE(III) ions into the organic phase is considered.

中文翻译：

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用双[(二苯基磷酰基)乙酰胺]烷烃从硝酸溶液中提取 U(VI)、Th(IV) 和 REE(III)

摘要

发现通过酰胺原子与亚烷基桥在同一分子中结合两个双齿片段 Ph ₂ P(O)CH ₂ C(O)NAlk– 导致 U(VI)、Th( IV) 和来自硝酸溶液的 REE(III)。确定被提取的复合物的化学计量。萃取剂的结构、水相中的HNO ₃浓度和有机溶剂的性质对 U(VI)、Th(IV) 和 REE(III) 离子萃取到有机相中的效率的影响被认为。