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(11)

EP 4 824 194 A1

(12)

(43) Date of publication: 21.10.2026 Bulletin 2026/43 (21) Application number: 24821147.6 (22) Date of filing: 03.12.2024

(51) International Patent Classification (IPC):  C10G 2/00(2006.01) C01B 3/34(2006.01) C10K 3/02(2006.01) C01B 3/04(2026.01) C02F 1/461(2023.01) (52) Cooperative Patent Classification (CPC): C10K 3/026; C10G 2/32; C01B 3/34; C01B 3/042; C02F 1/461; C01B 3/12; C01B 2203/0233; C01B 2203/0475; C01B 2203/0495; C01B 2203/062 (86) International application number: PCT/GB2024/053018 (87) International publication number: WO 2025/163280 (07.08.2025 Gazette 2025/32)

(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: 01.02.2024 GB 202401329 (71) Applicant: Johnson Matthey Davy Technologies Limited London EC2V 7AD (GB)	(72) Inventors: AHMADIANI, Mohammad Stockton-on- Tees TS17 6PY (GB) CHAN, Chi Ying London W2 6LG (GB) (74) Representative: Johnson Matthey Davy Technologies Limited  P.O. Box 1 Belasis Avenue Billingham TS23 1LH Billingham TS23 1LH (GB)