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(11)

EP 4 237 372 A1

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(43) Date of publication: 06.09.2023 Bulletin 2023/36 (21) Application number: 21884192.2 (22) Date of filing: 01.11.2021

(51) International Patent Classification (IPC):  C01B 3/24(2006.01) C01B 3/02(2006.01) C01B 32/205(2017.01) B01D 53/047(2006.01) C01B 32/00(2017.01) (52) Cooperative Patent Classification (CPC): C01B 3/24; C01B 32/205; Y02C 20/20; Y02P 20/10; Y02P 20/50; Y02P 20/129; Y02P 20/151; B01D 2256/16; B01D 2257/702; B01D 2259/402; C01B 2203/0272; C01B 2203/04; C01B 2203/043; C01B 2203/0485; C01B 2203/148; C01B 3/50; C01B 2203/0861; C01B 2203/048; C01B 2203/16; C01B 2203/0872; C01B 3/56; C01B 32/05 (86) International application number: PCT/CA2021/000099 (87) International publication number: WO 2022/087708 (05.05.2022 Gazette 2022/18)

(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: 30.10.2020 US 202063107555 P (71) Applicant: Pyrogenesis Canada Inc. Montréal, QC H3J 1R4 (CA)	(72) Inventors: PICARD, François Montréal, Québec H1X 2C1 (CA) SHAHVERDI, Ali Verdun, Québec H3E 1L3 (CA) CARABIN, Pierre Montréal, Québec H2Y 3Z8 (CA) (74) Representative: IPrime Rentsch Kaelin AG  Hirschengraben 1 8001 Zürich 8001 Zürich (CH)