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2 184 083

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IPC

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Application

2000122477/12, 2000-08-25

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Start date

2000-08-25

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Actual filing date

2000-08-25

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Published

2002-06-27

(72)

Inventor

Kruglov S.N.Zelentsov E.M.Korotkevich V.M.Kondakov V.M.Kozyrev A.S.Mikhajlova N.A.Rjabov A.S.Jushkeeva T.V.

(73)

Holder

Federal'Noe Gosudarstvennoe Unitarnoe Predprijatie Khimicheskij Kombinat"

METHOD OF PURIFYING URANIUM(VI) FROM TECHNETIUM(VII) Russian patent published in 2002 - IPC

Abstract RU 2184083 C2

FIELD: uranium processing. SUBSTANCE: to remove beta-technetium-99 from crude uranium, technetium(VII) is reduced with hydrazine at molar ratio [NO-3

]/[U(VI)] in uranium compound below 2. Uranium(VI) is then extracted with tributyl phosphate in organic diluent at molar ratio [NO-3

]/[U(VI)] in uranium compound equal to 2, after which operation technetium remains in aqueous phase. Organic phase containing uranium is washed with nitric acid solution containing hydrazine and optionally uranium(IV). Uranium solution obtained in technetium(VII) reduction stage is combined with spent wash solution. EFFECT: increased technetium removal degree. 5 cl, 3 tbl, 2 ex

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RU 2 184 083 C2

Authors

Kruglov S.N.

Zelentsov E.M.

Korotkevich V.M.

Kondakov V.M.

Kozyrev A.S.

Mikhajlova N.A.

Rjabov A.S.

Jushkeeva T.V.

Dates

2002-06-27—Published

2000-08-25—Filed