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2 490 210

(13)

(51)

IPC

C01G43/00(2006-01-01)

(21) (22)

Application

2011152163/05, 2011-12-20

(24)

Start date

2011-12-20

(22)

Actual filing date

2011-12-20

(45)

Published

2013-08-20

(72)

Inventor

Volk Vladimir IvanovichAlekseenko Vladimir NikolaevichDvoeglazov Konstantin NikolaevichAlekseenko Sergej NikolaevichPodrezova Ljubov' NikolaevnaKrivitskij Jurij Grigor'EvichD'Jachenko Anton Sergeevich

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Nauchno-Issledovatel'Skij Institut Neorganicheskikh Materialov Imeni Akademika A.A. Bochvara"

METHOD OF PROCESSING NITRATE SOLUTION OF RECOVERED URANIUM COMBINED WITH REMOVAL OF TECHNETIUM Russian patent published in 2013 - IPC C01G43/00

Abstract RU 2490210 C1

FIELD: process engineering.

SUBSTANCE: invention relates to processing regenerated uranium for removing technetium-99 that represents beta-active radiator. Proposed method comprises extraction of uranium (VI) by tri-butyl phosphate in organic solvent, cleaning the extract in extraction cascade flushing zone by reducing agent composed of nitrate solution containing carbohydrazide and re-extraction of uranium. Note here that technetium in said flushing zone is changed into non-extractable state by introducing amino carboxylic acid into solution of reducing agent.

EFFECT: higher efficiency of separation of uranium and technetium, ruled out back oxidation of technetium and reduced amount of liquid radioactive wastes.

3 cl, 2 tbl, 2 ex

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RU 2 490 210 C1

Authors

Volk Vladimir Ivanovich

Alekseenko Vladimir Nikolaevich

Dvoeglazov Konstantin Nikolaevich

Alekseenko Sergej Nikolaevich

Podrezova Ljubov' Nikolaevna

Krivitskij Jurij Grigor'Evich

D'Jachenko Anton Sergeevich

Dates

2013-08-20—Published

2011-12-20—Filed