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- W1991533988 abstract "Novel polyfunctional neutral organophosphorus ligands, namely 1,5-N,N'-bis[(diphenylphosphoryl)acetyl(alkyl)amino]pentanes [Ph2P(O)CH2C(O)NR]2(CH2)5 (Ia, R = C6H13; Ib, R = CH3), were studied as extractants for Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Th, and U from nitric acid solutions. The effect of both HNO3 concentration in the aqueous phase and that of the extractant in the organic phase on the extraction of metal ions is considered. The stoichiometry of the extracted complexes was determined by the slope analysis method. Compared with the related bisaminopentane [Ph2P(O)CH2C(O)NH]2(CH2)5 (Ic), the replacement of hydrogen atoms at the amide nitrogens by alkyl radicals (compounds Ia,b) leads to an increase of metal ions extraction. Bis-CMPO ligands Ia-c were found to possess higher extraction efficiency towards U(VI), Th(IV), and Ln(III) than their monophosphorylated analogue Ph2P(O)CH2C(O)N(C4H9)2." @default.
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- W1991533988 date "2012-10-01" @default.
- W1991533988 modified "2023-10-17" @default.
- W1991533988 title "Extraction of Lanthanides(III), U(VI), and Th(IV) from Nitric Acid Solutions with 1,5-<i>N,N'</i>-Bis[(diphenylphosphoryl)acetylamino]pentanes" @default.
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- W1991533988 doi "https://doi.org/10.1080/07366299.2012.671117" @default.
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