(19)

(11)

EP 3 966 162 A1

(12)

(43) Date of publication: 16.03.2022 Bulletin 2022/11 (21) Application number: 20724224.9 (22) Date of filing: 07.05.2020

(51) International Patent Classification (IPC):  C01B 25/02(2006.01) C02F 1/52(2006.01) (52) Cooperative Patent Classification (CPC): C01B 25/02 (86) International application number: PCT/IB2020/054314 (87) International publication number: WO 2020/225760 (12.11.2020 Gazette 2020/46)

(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: 07.05.2019 NL 2023083 (71) Applicant: Axpip B.V. 6813 JE Arnhem (NL)	(72) Inventor: HORSTINK, Franciscus Henricus 6813 JE Arnhem (NL) (74) Representative: Jilderda, Anne Ayolt  LIOC Patents & Trademarks Zwaanstraat 31 L 5651 CA Eindhoven 5651 CA Eindhoven (NL)