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(11)

EP 4 551 736 A1

(12)

(43) Date of publication: 14.05.2025 Bulletin 2025/20 (21) Application number: 23738548.9 (22) Date of filing: 05.07.2023

(51) International Patent Classification (IPC):  C25B 3/03(2021.01) C25B 15/08(2006.01) C25B 15/027(2021.01) C25B 3/25(2021.01) (52) Cooperative Patent Classification (CPC): C25B 3/03; C25B 3/25; C25B 15/027; C25B 15/081; C25B 15/083 (86) International application number: PCT/EP2023/068544 (87) International publication number: WO 2024/008793 (11.01.2024 Gazette 2024/02)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 08.07.2022 US 202263359271 P 20.07.2022 EP 22186030 (71) Applicant: Shell Internationale Research Maatschappij B.V. 2596 HR The Hague (NL)	(72) Inventors: VERMA, Sumit Houston, Texas 77082 (US) OLTHOF, Timothé Johannes 1031HW Amsterdam (NL) CORBETT, Paul Joseph 1031 HW Amsterdam (NL) BALAJI, Sayee Prasaad 1031 HW Amsterdam (NL) (74) Representative: Shell Legal Services IP  PO Box 384 2501 CJ The Hague 2501 CJ The Hague (NL)