Commissariat a L'energie Atomique Et Aux Energies Alternatives

Areva Nc

Ocp Sa

Marie-Thérèse Duchesne

Marc Lemaire

Stéphane Pellet-Rostaing

Driss Dhiba

Gilles Bernier

Xavier Heres

Marinella Mazzanti

Fabien Burdet

Hamid Mazouz

Alain Favre-Reguillon

Eugen Andreiadis

Julien Borrini

Abla Ouaattou

The use of a synergistic mixture of extractants for extracting at least one rare earth element from an aqueous medium comprising phosphoric acid. The mixture comprises: —a first extractant of formula (I): wherein Rand R, which are identical or different, represent a linear or branched, saturated or unsaturated hydrocarbon group, comprising from 6 to 12 carbon atoms, or a phenyl group optionally substituted by a linear or branched, saturated or unsaturated hydrocarbon group, comprising from 1 to 10 carbon atoms; and—a second extractant of formula (II): in which Rrepresents a linear or branched alkyl group, comprising from 6 to 12 carbon atoms. Use of the synergistic mixture in the treatment of phosphate minerals with a view to recovering the rare earth elements contained in the minerals.

Use of synergistic mixture of extractants for extracting rare earth elements from an aqueous medium comprising phosphoric acid

A process which allows separation of americium present in an acid aqueous phase or in an organic phase from the other metal elements also found in this phase, by complexation of the americium with a water-soluble ethylenediamine derivative; and a process for selective recovery of americium from an acid aqueous phase containing, in addition to americium, other metal elements, which comprises the application of this separation process.

Process for separating americium from other metallic elements present in an acidic aqueous or organic phase

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Bollene, France

Marie-Thérèse Duchesne