(19)

(11)

EP 4 460 592 A1

(12)

(43) Date of publication: 13.11.2024 Bulletin 2024/46 (21) Application number: 22839435.9 (22) Date of filing: 22.12.2022

(51) International Patent Classification (IPC):  C23F 11/12(2006.01) C23F 11/14(2006.01) (52) Cooperative Patent Classification (CPC): C23F 11/124; C23F 11/126; C23F 11/128; C23F 11/145 (86) International application number: PCT/GB2022/053367 (87) International publication number: WO 2023/131780 (13.07.2023 Gazette 2023/28)

(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: 04.01.2022 GB 202200031 (71) Applicant: Innospec Limited Ellesmere Port, Cheshire CH65 4EY (GB)	(72) Inventors: SHORE, Emma Ruth Ellesmere Port Cheshire CH65 4EY (GB) TRENHOLME, William James Francis Ellesmere Port Cheshire CH65 4EY (GB) TELFORD, Matthew Adam Ellesmere Port Cheshire CH65 4EY (GB) GILES, Matthew Robert Ellesmere Port Cheshire CH65 4EY (GB) (74) Representative: Appleyard Lees IP LLP  15 Clare Road Halifax HX1 2HY Halifax HX1 2HY (GB)