Electricite De France

Commissariat a L'energie Atomique Et Aux Energies Alternatives

Commissariat a L'energie Atomique Et Aux Energies

Orano Cycle

Orano Recyclage

Emilie Russello

Manuel Miguirditchian

Christian Sorel

Cécile Marie

Eugen Andreiadis

Dominique Guillaumont

Gaëlle Milanole

Clémence Berger

Guillaume Mossand

A dissymmetric RN,N-dialkylamides of formula (I) in which: Rrepresents a linear Cto Calkyl, Rrepresents a linear Cto Calkyl, and Rrepresents a linear or branched Cto Calkyl, where Ris different from a n-octyl, n-decyl, n-dodecyl, 2-ethylhexyl and 2-ethyloctyl group when Rrepresents a n-butyl group and Rrepresents an ethyl group. A method for synthesising the N,N-dialkylamides, and uses of same for extracting uranium and/or plutonium from an aqueous acid solution or for fully or partially separating the uranium from the plutonium contained in an aqueous acid solution and a solution resulting from the dissolution of spent nuclear fuel in nitric acid. A method for treating an aqueous solution resulting from the dissolution of spent nuclear fuel in nitric acid, which allows the uranium and the plutonium contained in the solution to be extracted, separated and decontaminated in a single cycle.

Dissymmetric N,N-dialkylamides used particularly for separating uranium(VI) from plutonium(IV), synthesis thereof and uses of same

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&#x2014;UOX) or uranium and plutonium (especially mixed uranium and plutonium oxides&#x2014;MOX).

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

Growing community of inventors

Bagnols sur Ceze, France

Emilie Russello