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V. A. Babain, M. Yu. Alyapyshev, R. N. Kiseleva

Metal extraction by N,N′-dialkyl-N,N′-diaryl-dipicolinamides from nitric acid solutions

Keywords: Dialkyl-diarylamides of 2,6-pyridine-dicarboxylic (dipicolinic) acid, Extraction, Americum, Uranium, Europium

A study of americium, uranium and europium extraction by various dialkyl-diarylamides of 2,6-pyridine-dicarboxylic (dipicolinic) acid has shown that maximum extractability is achieved by using polar fluorine-substituted diluents. Generally, the diamide extractability is found to increase with the alkyl radical length. We have demonstrated the possibility to separate Am and Eu in solutions with a nitric acid concentration of 0.5–2 mol/l. The extractability of these diamides with respect to the three metals rises with the acid concentration increase to 6 mol/l.

Radiochimica Acta, Oldenbourg Wissenschaftsverlag

Print ISSN: 0033-8230
Volume: 95, 04/2007
Pages: 217 - 223

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