(19)

(11)

EP 4 519 468 A1

(12)

(43) Date of publication: 12.03.2025 Bulletin 2025/11 (21) Application number: 23725583.1 (22) Date of filing: 04.05.2023

(51) International Patent Classification (IPC):  C22B 3/10(2006.01) C01G 53/09(2006.01) C22B 3/00(2006.01) (52) Cooperative Patent Classification (CPC): C22B 3/10; C22B 23/0423; C01G 53/09; C01G 51/085 (86) International application number: PCT/EP2023/061744 (87) International publication number: WO 2023/213919 (09.11.2023 Gazette 2023/45)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 05.05.2022 EP 22171837 (71) Applicant: Umicore 1000 Brussels (BE)	(72) Inventor: KLAASEN, Bart 2250 Olen (BE) (74) Representative: Umicore RDI Patent Department  Watertorenstraat 33 2250 Olen 2250 Olen (BE)