(19)

(11)

EP 4 204 356 A1

(12)

(43) Date of publication: 05.07.2023 Bulletin 2023/27 (21) Application number: 21862790.9 (22) Date of filing: 27.08.2021

(51) International Patent Classification (IPC):  C01B 3/50(2006.01) B01D 69/10(2006.01) C01B 3/56(2006.01) B01D 53/22(2006.01) B01D 71/02(2006.01) (52) Cooperative Patent Classification (CPC): C01B 3/501; C01B 2203/1223; C01B 2203/1294; C01B 2203/0233; C01B 2203/0811; C01B 2203/0445; C01B 2203/1614; C01B 2203/146; Y02E 60/36; B01D 2256/16; B01D 2053/222; B01D 69/02; B01D 2325/20; B01D 2257/504; B01D 2257/502; B01D 2257/7025; B01D 2257/80; Y02E 60/50 (86) International application number: PCT/US2021/047866 (87) International publication number: WO 2022/047106 (03.03.2022 Gazette 2022/09)

(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: 27.08.2020 US 202063071139 P 26.08.2021 US 202117412581 (71) Applicant: Element 1 Corp Bend, Oregon 97701 (US)	(72) Inventors: EDLUND, David, J. Bend, OR 97702 (US) STUDEBAKER, Robert, Todd Bend, OR 97703 (US) (74) Representative: Schröer, Gernot H. et al Meissner Bolte Patentanwälte Rechtsanwälte Partnerschaft mbB Bankgasse 3 90402 Nürnberg 90402 Nürnberg (DE)