Process for liquid-liquid extraction of rare earths or actinides via synergistic combination of a co-solvent hydrotrope with anionic or chelating extractants
AssigneesCommissariat A L'energie Atomique Et Aux Energies Alternatives, Centre National De La Recherche Scientifique, Universite De Montpellier, Ecole Nationale Superieure De Chimie De Montpellier
InventorsThomas ZEMB, Asmae EL MAANGAR, Jean DUHAMET, Stéphane PELLET-ROSTAING
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Abstract
A process for liquid-liquid extraction of at least one salt of a metal selected from elements from the rare earths group and from the actinides group from an acidic aqueous phase containing them. The process includes, in particular, a step of mixing an acidic aqueous phase including the salt of the metal and at least one non-ionic hydrotrope with an organic phase having at least one non-ionic hydrotrope and at least one extractant.
Claims21
1-20. (canceled)
A process for liquid-liquid extraction of at least one salt of a metal selected from elements of the rare earths group and the actinides group from an acidic aqueous phase containing them, said process comprising at least the following steps of:
- (i) preparing a balanced acidic aqueous phase (Phaq.e) comprising said at least one salt of said metal and at least one non-ionic hydrotropic agent in an initial amount Q1,
- (ii) preparing an organic phase (Phorg) comprising at least one non-ionic hydrotropic agent in an initial amount Q2 and at least one extractant,
- (iii) contacting said organic phase prepared above in step (ii) with said balanced acidic aqueous phase prepared above in step (i), to obtain a mixture M,
- (iv) stirring said mixture M, and then
- (v) separating said organic phase from said balanced acidic aqueous phase.
A process for liquid-liquid extraction of a metal selected from elements of the rare earths group and the actinides group from an acidic aqueous phase containing said metals and a non-ionic hydrotropic agent, comprising contacting an organic phase comprising at least one extractant and a non-ionic hydrotropic agent with an acidic aqueous phase containing said metals and a non-ionic hydrotropic agent.
Dependencies are inferred from the claim text.