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EP 4 798 331 A1

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(43) Date of publication: 02.09.2026 Bulletin 2026/36 (21) Application number: 24787531.3 (22) Date of filing: 16.10.2024

(51) International Patent Classification (IPC):  B01D 11/04(2006.01) C07C 51/48(2006.01) C07C 31/08(2006.01) C07C 29/86(2006.01) C12P 7/40(2006.01) C07C 53/126(2006.01) (52) Cooperative Patent Classification (CPC): C07C 51/48; C07C 29/86; C12P 7/40; B01D 11/0492   C-Sets: C07C 51/48, C07C 53/126; C07C 29/86, C07C 31/08; (86) International application number: PCT/EP2024/079155 (87) International publication number: WO 2025/087759 (01.05.2025 Gazette 2025/18)

(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: GE KH MA MD TN (30) Priority: 26.10.2023 EP 23205969 (71) Applicant: Evonik Operations GmbH 45128 Essen (DE)	(72) Inventors: HAAS, Thomas 60322 Frankfurt (DE) DEMLER, Martin 46286 Dorsten (DE) REMPE, Henrick Jens 48151 Münster (DE) (74) Representative: Evonik Patent Association  c/o Evonik Industries AG IP Management Postcode 84/339 Rodenbacher Chaussee 4 63457 Hanau 63457 Hanau (DE)