(19)

(11)

EP 4 304 756 A1

(12)

(43) Date of publication: 17.01.2024 Bulletin 2024/03 (21) Application number: 22711043.4 (22) Date of filing: 08.03.2022

(51) International Patent Classification (IPC):  B01D 35/30(2006.01) C02F 1/00(2023.01) B01D 36/00(2006.01) C02F 1/44(2023.01) (52) Cooperative Patent Classification (CPC): B01D 2201/24; B01D 2201/301; B01D 2201/305; B01D 2201/4007; B01D 35/30; B01D 35/306; B01D 36/001; C02F 2201/006; C02F 1/44 (86) International application number: PCT/EP2022/055822 (87) International publication number: WO 2022/189399 (15.09.2022 Gazette 2022/37)

(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: 11.03.2021 EP 21162024 (71) Applicant: BRITA SE 65232 Taunusstein (DE)	(72) Inventor: BUNNEMANN, Phillip 65599 Dornburg (DE)