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AssigneesCommissariat A L'energie Atomique Et Aux Energies Alternatives, Centre National De La Recherche Scientifique, Universite De Montpellier
InventorsStéphane Pellet-Rostaing, Julien Rey, Sandrine Dourdain, Guilhem Arrachart, Sefkan Atak
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An extractant which makes it possible to extract both light rare earths and heavy rare earths from an aqueous phosphoric acid solution, likely to be present in this solution, and which is characterised in that it comprises: a compound of formula (I) below: wherein R1 and R2, identical or different, are a hydrocarbon group, saturated or unsaturated, linear or branched, in C6 to C12; R3 is a hydrocarbon group, in C1 to C6, or a hydrocarbon group, saturated or unsaturated, monocyclic, in C3 to C8; R4 and R5, identical or different, are a hydrogen atom or a hydrocarbonate group, saturated or unsaturated, linear or branched, in C2 to C8; and a surfactant. Applications of this extractant include treatment of aqueous solutions from the leaching of natural phosphates by sulphuric acid and aqueous solutions from the leaching of urban minerals by phosphoric acid, in view of making profitable use of the rare earths present in these solutions.
An extractant comprising:
A method for extracting at least one rare earth from an aqueous phosphoric acid solution, comprising contacting the aqueous solution with a non-water miscible organic solution comprising an extractant in an organic diluent, then separating the aqueous solution and the organic solution, in which the extractant comprises:
A method for recovering at least one rare earth from an aqueous phosphoric acid solution, comprising:
Dependencies are inferred from the claim text.