Patent · US Active

Carbamides for separating uranium(VI) and plutonium(IV) without reducing the plutonium(IV)

US11479833B2 · kind B2 · utility

0Cited by

3References

13Claims

0Family size

Assignees

COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR
ORANO CYCLE · FR
ELECTRICITE DE FRANCE · FR

Inventors

Cécile Marie · Avignon, FR
Clémence Berger · Avignon, FR
Guillaume Mossand · Avignon, FR
Emilie Russello · Bagnol, FR
Eugen Andreiadis · Avignon, FR
Dominique Guillaumont · Avignon, FR
Manuel Miguirditchian · Avignon, FR
Christian Sorel · Villeneuve-lès-Avignon, FR

Key dates

Filing date	Jun 28, 2018
Grant date	Oct 25, 2022
Priority date	—
Expiry date	Mar 1, 2039

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02W30/50
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The use of carbamides as extractants for fully or partially separating uranium(VI) from plutonium(IV) in an aqueous solution obtained by dissolving a spent nuclear fuel in nitric acid, by method of liquid-liquid extraction, without carrying out any reduction of the plutonium(IV) to plutonium(III). The invention also relates to new carbamides. Uses are the processing of spent nuclear fuels based on uranium (especially uranium oxides—UOX) or uranium and plutonium (especially mixed uranium and plutonium oxides—MOX).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.