Extraction of Lutetium with Solutions of 2-Ethylhexyl Hydrogen 2-Ethylhexylphosphonate in Hexane from Nitric Acid Solutions Containing Ytterbium

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Resumo

The extraction of lutetium with 0.5–2 M solutions of 2-ethylhexyl hydrogen 2-ethylhexylphosphonate (HEH[EHP]) in hexane from 0.5–2 M solutions of nitric acid containing ytterbium at a lutetium concentration of 0.57 mM (0.1 g/L) and a ratio of lutetium and ytterbium concentrations of 1 : 1 to 1 : 50 was studied. The extraction mechanisms of both lanthanides are identical under the conditions studied. The effect of excess ytterbium on the distribution of lutetium during extraction is due to a decrease in the concentration of the free extractant. A model describing the dependence of the lutetium distribution coefficient on the concentration of ytterbium in the aqueous phase at various concentrations of the extractant and nitric acid is proposed; it satisfactorily agrees with the experimental data.

Sobre autores

K. Bobrovskaya

Kapitsa Research Institute of Technology, Ulyanovsk State University

Ulyanovsk, Russia

R. Kuznetsov

Kapitsa Research Institute of Technology, Ulyanovsk State University

Email: rostislavkuznetsov@yandex.ru
Ulyanovsk, Russia

M. Lisova

Kapitsa Research Institute of Technology, Ulyanovsk State University

Ulyanovsk, Russia

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