FIELD: chemistry.
SUBSTANCE: method involves co-sedimentation of admixture-containing solution of americium oxalate on a carrier represented by calcium oxalate, followed by obtaining nitrate americium-containing solution and americium oxalate, with its further calcination to dioxideo. Americium-containing carrier sediment is also calcinated to oxides. Nitrate solution is obtained by dissolving oxides formed during calcination in nitric acid. Americium is extracted from nitrate solution with the help of solid extragent based on diisooctylmethylphosphonate, with further re-extraction. Americium oxalate is obtained by sedimentation from condensed re-extract.
EFFECT: extended range of methods of obtaining dioxide.
3 cl, 3 ex
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