FIELD: chemistry.
SUBSTANCE: invention relates to use of diglycolamide in an acidic aqueous phase containing americium, curium and/or lanthanides as a separation factor-increasing complexing agent for extraction. Extraction includes contacting said acidic aqueous phase with a water-immiscible organic phase containing at least one extractant, different from diglycolamide, in an organic solvent.
EFFECT: increasing the separation factor between americium, curium and/or lanthanides.
11 cl, 5 tbl, 3 ex
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