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(11)

EP 4 770 953 A1

(12)

(43) Date of publication: 08.07.2026 Bulletin 2026/28 (21) Application number: 24761639.4 (22) Date of filing: 27.08.2024

(51) International Patent Classification (IPC):  C01B 3/34(2006.01) C01B 3/50(2026.01) C01B 3/48(2006.01) F25J 3/02(2006.01) (52) Cooperative Patent Classification (CPC): C01B 3/506; C01B 3/34; C01B 3/48; C01B 2203/0244; C01B 2203/0445; C01B 2203/0475; C01B 2203/0495; C01B 2203/147; F25J 3/0223; F25J 3/0252; F25J 3/0233; F25J 3/04539; F25J 3/04563; F25J 2260/44; F25J 2230/42; F25J 2270/14; F25J 2270/904; F25J 2210/42; F25J 3/0635; F25J 3/0655; F25J 2205/66; F25J 2245/42; F25J 2205/30; F25J 2270/20; F25J 2270/30; F25J 2270/04; F25J 2205/04; F25J 2200/74 (86) International application number: PCT/EP2024/073881 (87) International publication number: WO 2025/045857 (06.03.2025 Gazette 2025/10)

(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: 31.08.2023 EP 23194456 (71) Applicant: CASALE SA 6900 Lugano (CH)	(72) Inventors: FILIPPI, Ermanno 6976 Castagnola (CH) ZARDI, Riccardo Umberto 6932 Breganzona (CH) OSTUNI, Raffaele 6900 Lugano (CH) (74) Representative: M. Zardi & Co S.A.  Via G. B. Pioda, 6 6900 Lugano 6900 Lugano (CH)