(19)

(11)

EP 4 028 150 A1

(12)

(43) Date of publication: 20.07.2022 Bulletin 2022/29 (21) Application number: 20765040.9 (22) Date of filing: 08.09.2020

(51) International Patent Classification (IPC):  B01D 61/22(2006.01) B01D 65/10(2006.01) C02F 1/44(2006.01) B01D 65/02(2006.01) B01D 37/04(2006.01) (52) Cooperative Patent Classification (CPC): B01D 61/22; B01D 2313/48; B01D 2315/06; B01D 2315/20; B01D 65/02; B01D 2321/04; B01D 2321/16; B01D 2321/18; B01D 65/10; B01D 37/04; C02F 1/444; C02F 2303/22; C02F 2303/14; C02F 2209/03; C02F 2209/005 (86) International application number: PCT/EP2020/074997 (87) International publication number: WO 2021/048078 (18.03.2021 Gazette 2021/11)

(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: 09.09.2019 EP 19382783 (71) Applicant: Suez International 92040 Paris la Défense Cedex (FR)	(72) Inventors: ARNALDOS ORTS, Marina 08940 CORNELLÀ DE LLOBREGAT (ES) JOSEPH DURAN, Bernat 08360 CANET DE MAR (ES) ECHEVARRÍA DÍEZ-CANEDO, Carlos 08006 BARCELONA (ES) (74) Representative: August Debouzy  7, rue de Téhéran 75008 Paris 75008 Paris (FR)