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2 781 791

(13)

(51)

IPC

B01D11/04(2006-01-01)

G21F9/04(2006-01-01)

G21F9/12(2006-01-01)

(21) (22)

Application

2021138641, 2021-12-24

(24)

Start date

2021-12-24

(22)

Actual filing date

2021-12-24

(45)

Published

2022-10-18

(72)

Inventor

Tkachenko Lyudmila IgorevnaKenf Ekaterina VladimirovnaSmirnov Igor ValentinovichBabain Vasilij AleksandrovichAlyapyshev Mikhail Yurevich

(73)

Holder

Aktsionernoe Obshchestvo Institut Imeni V.G. Khlopina" Institut Im. V.G. Khlopina")

EXTRACTION MIXTURE FOR THE ISOLATION OF CAESIUM AND/OR STRONTIUM FROM NITRIC ACID SOLUTIONS Russian patent published in 2022 - IPC B01D11/04 G21F9/04 G21F9/12

Abstract RU 2781791 C1

FIELD: waste treatment.

SUBSTANCE: invention relates to the development of effective extractants for the isolation of long-lived radionuclides of caesium and strontium from nitric acid media and can be used in the processing of liquid radioactive waste. The extraction mixture for the isolation of caesium and/or strontium from nitric acid solutions includes crown ether having substituted aromatic fragments containing alkyl substituents of branched structure, and/or crown ether having substituted cyclohexane fragments containing alkyl substituents of branched structure, and an organic solvent immiscible with water. As an organic solvent, the mixture contains carbonates of fluorinated alcohols.

EFFECT: developing the composition of an extraction mixture based on a single-component solvent for the isolation of caesium and/or strontium from nitric acid solutions with a high degree of their extraction.

5 cl, 10 tbl

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RU 2 781 791 C1

Authors

Tkachenko Lyudmila Igorevna

Kenf Ekaterina Vladimirovna

Smirnov Igor Valentinovich

Babain Vasilij Aleksandrovich

Alyapyshev Mikhail Yurevich

Dates

2022-10-18—Published

2021-12-24—Filed