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1. WO2020065201 - USE OF A SYNERGISTIC MIXTURE OF EXTRACTANTS FOR EXTRACTING RARE EARTH ELEMENTS FROM AN AQUEOUS MEDIUM COMPRISING PHOSPHORIC ACID

Publication Number WO/2020/065201
Publication Date 02.04.2020
International Application No. PCT/FR2019/052238
International Filing Date 24.09.2019
IPC
C22B 3/26 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
3Extraction of metal compounds from ores or concentrates by wet processes
20Treatment or purification of solutions, e.g. obtained by leaching
26by liquid-liquid extraction using organic compounds
C22B 59/00 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
59Obtaining rare earth metals
C22B 3/40 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
3Extraction of metal compounds from ores or concentrates by wet processes
20Treatment or purification of solutions, e.g. obtained by leaching
26by liquid-liquid extraction using organic compounds
40Mixtures
CPC
C22B 3/0005
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
3Extraction of metal compounds from ores or concentrates by wet processes
0004Treatment or purification of solutions, e.g. obtained by leaching
0005by liquid-liquid extraction using organic compounds, e.g. acyclic or carbocyclic compounds, heterocyclic compounds, organo- metallic compounds, alcohols, ethers, or the like
C22B 3/0095
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
3Extraction of metal compounds from ores or concentrates by wet processes
0004Treatment or purification of solutions, e.g. obtained by leaching
0005by liquid-liquid extraction using organic compounds, e.g. acyclic or carbocyclic compounds, heterocyclic compounds, organo- metallic compounds, alcohols, ethers, or the like
004using organo-metallic compounds or organo compounds of boron, silicon, phosphorus, selenium or tellurim
0095using a mixture of organic agents wherein one agent at least is an organo-metallic compound
C22B 59/00
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
59Obtaining rare earth metals
Applicants
  • COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES [FR]/[FR]
  • OCP S.A [MA]/[MA]
Inventors
  • ANDREIADIS, Eugen
  • DUCHESNE, Marie-Thérèse
Agents
  • AHNER, Philippe
Priority Data
185878826.09.2018FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) USE OF A SYNERGISTIC MIXTURE OF EXTRACTANTS FOR EXTRACTING RARE EARTH ELEMENTS FROM AN AQUEOUS MEDIUM COMPRISING PHOSPHORIC ACID
(FR) UTILISATION D'UN MÉLANGE SYNERGIQUE D'EXTRACTANTS POUR EXTRAIRE DES TERRES RARES D'UN MILIEU AQUEUX COMPRENANT DE L'ACIDE PHOSPHORIQUE
Abstract
(EN)
The invention relates to the use of a synergistic mixture of extractants for extracting at least one rare earth element from an aqueous medium comprising phosphoric acid. Said mixture comprises: - a first extractant of formula (I): wherein R1 and R2, 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 R3 represents a linear or branched alkyl group, comprising from 6 to 12 carbon atoms. The invention can be used in the treatment of phosphate minerals with a view to recovering the rare earth elements contained in said minerals.
(FR)
L'invention se rapporte à l'utilisation d'un mélange synergique d'extractants pour extraire au moins une terre rare d'un milieu aqueux comprenant de l'acide phosphorique. Ce mélange comprend : - un premier extractant de formule (I) : dans laquelle R1 et R2, identiques ou différents, représentent un groupe hydrocarboné linéaire ou ramifié, saturé ou insaturé, comprenant de 6 à 12 atomes de carbone, ou un groupe phényle éventuellement substitué par un groupe hydrocarboné linéaire ou ramifié, saturé ou insaturé, comprenant de 1 à 10 atomes de carbone; et - un deuxième extractant de formule (II) : dans laquelle R3 représente un groupe alkyle linéaire ou ramifié, comprenant de 6 à 12 atomes de carbone. Applications : traitement des minerais de phosphates en vue de valoriser les terres rares présentes dans ces minerais.
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