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(11)

EP 3 607 112 A1

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(43) Date of publication: 12.02.2020 Bulletin 2020/07 (21) Application number: 18726329.8 (22) Date of filing: 03.04.2018

(51) International Patent Classification (IPC):  C25B 3/02(2006.01) C12P 13/12(2006.01) C12P 13/04(2006.01) (86) International application number: PCT/EP2018/058459 (87) International publication number: WO 2018/185084 (11.10.2018 Gazette 2018/41)

(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: 03.04.2017 EP 17164537 (71) Applicant: Evonik Operations GmbH 45128 Essen (DE)	(72) Inventors: HAAS, Thomas 48161 Münster (DE) RICHTER, Christian 48151 Münster (DE) (74) Representative: Evonik Patent Association  c/o Evonik Industries AG IP Management Bau 1042A/PB 15 Paul-Baumann-Straße 1 45772 Marl 45772 Marl (DE)