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EP 3 658 275 A1

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(43) Date of publication: 03.06.2020 Bulletin 2020/23 (21) Application number: 18740875.2 (22) Date of filing: 24.07.2018

(51) International Patent Classification (IPC):  B01J 20/04(2006.01) B01J 20/06(2006.01) B01J 20/28(2006.01) B03C 3/02(2006.01) B01J 20/02(2006.01) B01D 53/02(2006.01) B03C 3/013(2006.01) (86) International application number: PCT/EP2018/070012 (87) International publication number: WO 2019/020613 (31.01.2019 Gazette 2019/05)

(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: 24.07.2017 WO PCT/EP2017/068625 24.07.2017 US 201715657294 (71) Applicant: S.A. Lhoist Recherche et Développement 1342 Ottignies-Louvain-la-Neuve (BE)	(72) Inventors: FOO, Rodney Rayleigh Essex SS6 9QN (GB) FILIPPELLI, Gregory Martin Dillsburg Pennsylvania 17019 (US) HEISZWOLF, Johan 3090 Overijse (BE) (74) Representative: Gevers Patents  Intellectual Property House Holidaystraat 5 1831 Diegem 1831 Diegem (BE)