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1. (WO2018195642) DIRECT OXALATE PRECIPITATION FOR RARE EARTH ELEMENTS RECOVERY
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Pub. No.: WO/2018/195642 International Application No.: PCT/CA2017/050508
Publication Date: 01.11.2018 International Filing Date: 26.04.2017
IPC:
C22B 59/00 (2006.01) ,B01D 11/04 (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
59
Obtaining rare earth metals
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
11
Solvent extraction
04
of solutions which are liquid
Applicants:
HER MAJESTY THE QUEEN IN RIGHT OF CANADA AS REPRESENTED BY THE MINISTER OF NATURAL RESOURCES CANADA [CA/CA]; 580 Booth Street, 16th Floor Ottawa, Ontario K1A 0E4, CA
Inventors:
XIA, Chen; CA
GRIFFITH, Wesley; CA
Agent:
LAMBERT, Dominique; CA
LAMSON, Wendy; CA
Priority Data:
Title (EN) DIRECT OXALATE PRECIPITATION FOR RARE EARTH ELEMENTS RECOVERY
(FR) PRÉCIPITATION DIRECTE D'OXALATE POUR LA RÉCUPÉRATION D'ÉLÉMENTS DE TERRES RARES
Abstract:
(EN) The present specification provides a method for the recovery of rare earth elements in aqueous solution. In particular, a direct oxalate precipitation of rare earth elements from aqueous acid solution, comprising treatment with oxalic acid or oxalate solution in the presence of an additive salt is provided.
(FR) La présente invention concerne un procédé de récupération d'éléments de terres rares dans une solution aqueuse. En particulier, l'invention concerne une précipitation directe d'oxalate d'éléments de terres rares à partir d'une solution d'acide aqueuse, comprenant le traitement avec une solution d'oxalate ou d'acide oxalique en présence d'un sel d'additif.
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, 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)