(19)

(11)

EP 4 823 975 A1

(12)

(43) Date of publication: 21.10.2026 Bulletin 2026/43 (21) Application number: 24828001.8 (22) Date of filing: 10.12.2024

(51) International Patent Classification (IPC):  C01B 3/04(2026.01) C01B 3/56(2006.01) C01B 3/50(2026.01) (52) Cooperative Patent Classification (CPC): C01B 3/047; C01B 3/506; C01B 3/56; C01B 2203/043; C01B 2203/0495; C01B 2203/0465; C01B 2203/146; Y02E 60/36 (86) International application number: PCT/US2024/059334 (87) International publication number: WO 2025/128535 (19.06.2025 Gazette 2025/25)

(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: 15.12.2023 EP 23217340 (71) Applicant: L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude 75007 Paris (FR)	(72) Inventors: TRANIER, Jean-Pierre 78350 Jouy-en-Josas (FR) FUENTES, Francois Houston, TX 77024 (US) (74) Representative: Air Liquide  L'Air Liquide S.A. Direction de la Propriété Intellectuelle 75, Quai d'Orsay 75321 Paris Cedex 07 75321 Paris Cedex 07 (FR)