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EP 4 680 696 A1

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(43) Date of publication: 21.01.2026 Bulletin 2026/04 (21) Application number: 24708532.7 (22) Date of filing: 16.02.2024

(51) International Patent Classification (IPC):  C10G 2/00(2006.01) C10G 9/36(2006.01) C25B 1/02(2006.01) C25B 15/00(2006.01) C25B 11/00(2021.01) C10G 11/20(2006.01) C01B 3/34(2006.01) C10G 47/00(2006.01) C25B 1/23(2021.01) B01D 53/96(2006.01) C10G 11/00(2006.01) (52) Cooperative Patent Classification (CPC): C10G 2/32; C25B 1/23; C10G 9/36; C10G 47/00; C10G 2300/4081; C10G 11/00; C10G 11/20; B01D 53/965; B01D 53/8671; B01D 2257/504; C25B 15/081; C25B 9/23; C25B 9/77; C25B 1/04; C25B 9/70; C01B 3/34 (86) International application number: PCT/GB2024/050424 (87) International publication number: WO 2024/194595 (26.09.2024 Gazette 2024/39)

(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: GE KH MA MD TN (30) Priority: 17.03.2023 GB 202303927 (71) Applicant: Johnson Matthey Davy Technologies Limited London EC2V 7AD (GB)	(72) Inventors: CASSIDY, Paul John London W2 6LG (GB) CORBOS, Crina Reading Berkshire RG4 9NH (GB) (74) Representative: Johnson Matthey Plc  Intellectual Property Department Belasis Avenue Billingham TS23 1LB Billingham TS23 1LB (GB)