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(11)

EP 3 817 843 A1

(12)

(43) Date of publication: 12.05.2021 Bulletin 2021/19 (21) Application number: 19749443.8 (22) Date of filing: 04.07.2019

(51) International Patent Classification (IPC):  B01D 61/50(2006.01) H01M 8/22(2006.01) B01D 63/08(2006.01) (86) International application number: PCT/NL2019/050420 (87) International publication number: WO 2020/009581 (09.01.2020 Gazette 2020/02)

(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: 04.07.2018 NL 2021248 (71) Applicant: Redstack B.V. 8606 BT Sneek (NL)	(72) Inventors: GOETING, Christiaan Haldir 8606 BT Sneek (NL) KUNTENG, Damnearn 8606 BT Sneek (NL) (74) Representative: Arnold & Siedsma  Bezuidenhoutseweg 57 2594 AC The Hague 2594 AC The Hague (NL)