(19)

(11)

EP 4 739 418 A2

(12)

(88) Date of publication A3: 17.04.2025 (43) Date of publication: 13.05.2026 Bulletin 2026/20 (21) Application number: 24840625.8 (22) Date of filing: 12.07.2024

(51) International Patent Classification (IPC):  B01D 19/00(2006.01) (52) Cooperative Patent Classification (CPC): B01D 19/0036 (86) International application number: PCT/US2024/037774 (87) International publication number: WO 2025/015262 (16.01.2025 Gazette 2025/03)

(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: 13.07.2023 US 202363513517 P 21.09.2023 FI 20236045 (71) Applicant: KEMIRA OYJ 00180 Helsinki (FI)	(72) Inventors: CARLETTI, Claudio 02271 Espoo (FI) BOND, Marshall Richmond Hill, Georgia 31324 (US) (74) Representative: Page White Farrer  Bedford House 21a John Street London WC1N 2BF London WC1N 2BF (GB)