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EP 4 532 781 A1

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(43) Date of publication: 09.04.2025 Bulletin 2025/15 (21) Application number: 23812260.0 (22) Date of filing: 22.05.2023

(51) International Patent Classification (IPC):  C22B 1/00(2006.01) C22B 11/08(2006.01) C22B 3/18(2006.01) (52) Cooperative Patent Classification (CPC): C22B 11/08; C22B 3/18; C22B 3/10; C22B 3/08; C22B 3/065; C22B 11/048 (86) International application number: PCT/SG2023/050353 (87) International publication number: WO 2023/229528 (30.11.2023 Gazette 2023/48)

(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: 24.05.2022 SG 10202205512Y (71) Applicant: National University of Singapore Singapore 119077 (SG)

(72) Inventors: KARIM, Salman Singapore College of Design and Engineering / Dept. of Chemical and Biomolecular Engineering 21 Lower Kent Ridge Road Singapore 119077 (SG) TING, Yen-Peng Singapore College of Design and Engineering / Dept. of Chemical and Biomolecular Engineering 21 Lower Kent Ridge Road Singapore 119077 (SG) (74) Representative: Kilger, Ute  Boehmert & Boehmert Anwaltspartnerschaft mbB Pettenkoferstrasse 22 80336 München 80336 München (DE)