(19)

(11)

EP 4 334 038 A1

(12)

(43) Date of publication: 13.03.2024 Bulletin 2024/11 (21) Application number: 22724675.8 (22) Date of filing: 21.04.2022

(51) International Patent Classification (IPC):  B03C 1/025(2006.01) (52) Cooperative Patent Classification (CPC): B03C 1/025 (86) International application number: PCT/EP2022/060571 (87) International publication number: WO 2022/233586 (10.11.2022 Gazette 2022/45)

(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 MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 06.05.2021 GB 202106456 (71) Applicant: Research by British Lithium Limited Roche Cornwall PL26 8LX (GB)	(72) Inventor: SMITH, Roderick Roche Cornwall PL26 8LX (GB) (74) Representative: Sirius IP  Office 5:06, Festival House Jessop Avenue Cheltenham Gloucestershire GL50 3SH Gloucestershire GL50 3SH (GB)