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1. (WO2018037239) METHOD FOR FACILITATING SEPARATION OF ND FROM NDFEB MAGNETS
Latest bibliographic data on file with the International Bureau    Submit observation

Pub. No.: WO/2018/037239 International Application No.: PCT/GB2017/052502
Publication Date: 01.03.2018 International Filing Date: 25.08.2017
IPC:
B22F 9/02 (2006.01) ,C22B 59/00 (2006.01) ,B22F 9/00 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
22
CASTING; POWDER METALLURGY
F
WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
9
Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor
02
using physical processes
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
22
CASTING; POWDER METALLURGY
F
WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
9
Making metallic powder or suspensions thereof; Apparatus or devices specially adapted therefor
Applicants: THE UNIVERSITY OF BIRMINGHAM[GB/GB]; Edgbaston Birmingham B15 2TT, GB
Inventors: WALTON, Allan; GB
ROWSON, Neil; GB
Agent: BAILEY, Jennifer; GB
Priority Data:
1614476.825.08.2016GB
Title (EN) METHOD FOR FACILITATING SEPARATION OF ND FROM NDFEB MAGNETS
(FR) PROCÉDÉ POUR FACILITER LA SÉPARATION DU ND D'AIMANTS NDFEB
Abstract:
(EN) A method of preparing NdFeB powder for separation of the Nd therefrom comprises: providing (100, 102, 103) a source of NdFeB containing powder, subjecting (104) the powder to hydrogen disproportionation comprising exposing the powder to an atmosphere of hydrogen at an elevated temperature, maintaining (106) the hydrogen atmosphere and elevated temperature for a hold time sufficient for spherical pools of Nd-hydride to form, and cooling (108) the powder under the hydrogen atmosphere with subsequent evacuation (110) of the hydrogen.
(FR) L'invention concerne un procédé de préparation d'une poudre de NdFeB afin d'en séparer le Nd, le procédé consistant : à fournir (100, 102, 103) une source de poudre contenant du NdFeB, à soumettre (104) la poudre à une dismutation par l'hydrogène comportant l'exposition de la poudre à une atmosphère d'hydrogène à une température élevée, à maintenir (106) l'atmosphère d'hydrogène et la température élevée pendant une durée suffisante pour que des groupes sphériques de Nd-hydrure se forment, et à refroidir (108) la poudre dans l'atmosphère d'hydrogène, ce qui est suivi par l'évacuation (110) de l'hydrogène.
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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)