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EP 4 798 564 A1

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(43) Date of publication: 02.09.2026 Bulletin 2026/36 (21) Application number: 24818085.3 (22) Date of filing: 22.10.2024

(51) International Patent Classification (IPC):  C07C 51/47(2006.01) C07C 217/24(2006.01) (52) Cooperative Patent Classification (CPC): C07C 2603/92; C07C 217/24; C07C 51/47   C-Sets: C07C 51/47, C07C 53/21; (86) International application number: PCT/NL2024/050576 (87) International publication number: WO 2025/089944 (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: 23.10.2023 NL 2036098 (71) Applicant: Kemira OYJ 00180 Helsinki (FI)	(72) Inventors: GAO, Tu-Nan 8911 MA Leeuwarden (NL) MILOSERDOV, Fedor 8911 MA Leeuwarden (NL) ZUILHOF, Johannes Teunis 8911 MA Leeuwarden (NL) GOED, Jesse Milo Silvan 8911 MA Leeuwarden (NL) (74) Representative: Berggren Oy  P.O. Box 16 Fabianinkatu 21 00101 Helsinki 00101 Helsinki (FI)