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1. (WO2018167130) EXTRACTION OF RARE EARTH ELEMENTS WITH DEEP EUTECTIC SOLVENTS
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Pub. No.: WO/2018/167130 International Application No.: PCT/EP2018/056361
Publication Date: 20.09.2018 International Filing Date: 14.03.2018
IPC:
C22B 7/00 (2006.01) ,C22B 59/00 (2006.01)
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
B
PRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
7
Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
B
PRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
59
Obtaining rare earth metals
Applicants: FUNDACION TECNALIA RESEARCH & INNOVATION[ES/ES]; Parque Científico y Tecnológico de Gipuzkoa Mikeletegi Pasealekua, 2 20009 DONOSTIA - SAN SEBASTIÁN, ES
Inventors: SIRIWARDANA, Amal; ES
SÁNCHEZ CUPIDO, Laura; ES
HIDALGO BETANZOS, Jokin; ES
NIETO MAESTRE, Francisco Javier; ES
Agent: ZBM PATENTS - ZEA, BARLOCCI & MARKVARDSEN; Pl. Catalunya, 1 2nd floor 08002 BARCELONA, ES
Priority Data:
17382134.915.03.2017EP
Title (EN) EXTRACTION OF RARE EARTH ELEMENTS WITH DEEP EUTECTIC SOLVENTS
(FR) EXTRACTION D'ÉLÉMENTS TERRES RARES AU MOYEN DE SOLVANTS EUTECTIQUES PROFONDS
Abstract:
(EN) It relates to process for the extraction of rare earth elements from a starting product containing them in metal or alloy form which comprises: a) contacting the starting product containing rare earth elements in metal or alloy form with a deep eutectic solvent that consists of a mixture of a hydrogen bond acceptor (HBA) compound (A) selected from a salt of the formula Cat+X (I), betaine or a salt thereof, and carnitine or a salt thereof; and a hydrogen bond donor (HBD) compound (B) in a molar ratio of (A) to (B) from 1:10 to 10:1, wherein the deep eutectic solvent is capable of extracting at least 50%w/w of one or more rare earth elements contained in the starting solid product in less than 5 hours, and b) separating the solvent containing the rare earth elements in dissolution from the undissolved solid.
(FR) La présente invention concerne un procédé d'extraction d'éléments terres rares à partir d'un produit de départ contenant une forme de métal ou d’alliage comprenant : a) la mise en contact du produit de départ contenant des éléments terres rares sous forme de métal ou d'alliage avec un solvant eutectique profond qui est constitué d’un mélange d'un composé accepteur de liaison hydrogène (HBA) (A) choisi parmi un sel de formule Cat+X (I), la bétaïne ou un sel de celle-ci et la carnitine ou un sel de celle-ci ; et un composé donneur de liaison hydrogène (HBD) (B) dans un rapport molaire de (A) à (B) de 1:10 à 10:1, le solvant eutectique profond pouvant extraire au moins 50 % m/m en poids d’un ou plusieurs éléments terres rares contenus dans le produit solide de départ en moins de 5 heures, et b) la séparation du solvant contenant les éléments terres rares en dissolution du solide non dissous.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)