(19)

(11)

EP 4 277 873 A1

(12)

(43) Date of publication: 22.11.2023 Bulletin 2023/47 (21) Application number: 22700918.0 (22) Date of filing: 11.01.2022

(51) International Patent Classification (IPC):  C01B 3/00(2006.01) B01J 20/10(2006.01) (52) Cooperative Patent Classification (CPC): C01B 3/0021; C01B 3/001 (86) International application number: PCT/EP2022/050391 (87) International publication number: WO 2022/152669 (21.07.2022 Gazette 2022/29)

(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 MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 15.01.2021 GB 202100528 (71) Applicant: Katholieke Universiteit Leuven 3000 Leuven (BE)	(72) Inventors: MARTENS, Johan 3051 Sint-Joris-Weert (BE) HOULLEBERGHS, Maarten Jan 2500 Lier (BE) BREYNAERT, Eric 1547 Bever (BE) (74) Representative: Beck, Michaël Andries T.  IPLodge Technologielaan 9 3001 Heverlee 3001 Heverlee (BE)