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(11)

EP 4 739 653 A1

(12)

(43) Date of publication: 13.05.2026 Bulletin 2026/20 (21) Application number: 24740530.1 (22) Date of filing: 03.07.2024

(51) International Patent Classification (IPC):  C07C 303/22(2006.01) C07C 309/15(2006.01) C07C 309/14(2006.01) C11D 1/12(2006.01) (52) Cooperative Patent Classification (CPC): C07C 309/14; C07C 309/15; C07C 303/22; C11D 1/12; C11D 1/28; C11D 1/123   C-Sets: C07C 303/22, C07C 309/15; (86) International application number: PCT/GB2024/051732 (87) International publication number: WO 2025/008628 (09.01.2025 Gazette 2025/02)

(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: GE KH MA MD TN (30) Priority: 05.07.2023 GB 202310301 (71) Applicant: Innospec Limited Ellesmere Port, Cheshire CH65 4EY (GB)	(72) Inventors: SWALLOW, Peter Ellesmere Port Cheshire CH65 4EY (GB) GOUGH, Tony Ellesmere Port Cheshire CH65 4EY (GB) MCROBBIE, Ian Malcolm Ellesmere Port Cheshire CH65 4EY (GB) (74) Representative: Appleyard Lees IP LLP  G Mill Dean Clough Industrial Park Halifax HX3 5AH Halifax HX3 5AH (GB)