The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 11, 2022
Filed:
Sep. 14, 2017
Extractant for rare earth extraction from aqueous phosphoric acid solutions and method of extraction
Commissariat À L'énergie Atomique ET Aux Énergies Alternatives, Paris, FR;
Centre National DE LA Recherche Scientifique, Paris, FR;
Universite DE Montpellier, Montpellier, FR;
Stéphane Pellet-Rostaing, Villeurbanne, FR;
Julien Rey, Avignon, FR;
Sandrine Dourdain, Tresques, FR;
Guilhem Arrachart, Saint-Laurent-des-Arbres, FR;
Sefkan Atak, Lingolsheim, FR;
COMMISSARIAT Á L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES, Paris, FR;
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris, FR;
UNIVERSITE DE MONTPELLIER, Montpellier, FR;
Abstract
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.