US 12,351,926 B2
Process and integrated plant for the treatment of the carbon oxides formed in the production of aluminum
Frederik Scheiff, Ludwigshafen (DE); Marc Leduc, Ludwigshafen (DE); Andreas Bode, Ludwigshafen (DE); Karsten Bueker, Dortmund (DE); and Nicolai Antweiler, Essen (DE)
Assigned to BASF SE, Ludwigshafen am Rhein (DE); thyssenkrupp AG, Essen (DE); and thyssenkrupp Uhde GmbH, Dortmund (DE)
Appl. No. 17/596,027
Filed by BASF SE, Ludwigshafen am Rhein (DE); thyssenkrupp AG, Essen (DE); and thyssenkrupp Uhde GmbH, Dortmund (DE)
PCT Filed May 28, 2020, PCT No. PCT/EP2020/064778
§ 371(c)(1), (2) Date Dec. 2, 2021,
PCT Pub. No. WO2020/245015, PCT Pub. Date Dec. 10, 2020.
Claims priority of application No. 19178470 (EP), filed on Jun. 5, 2019.
Prior Publication US 2022/0349078 A1, Nov. 3, 2022
Int. Cl. C25C 3/22 (2006.01); C01B 3/38 (2006.01); C01B 32/40 (2017.01); C07C 1/12 (2006.01); C07C 29/50 (2006.01); C10K 3/02 (2006.01); C25C 3/12 (2006.01)
CPC C25C 3/22 (2013.01) [C01B 3/382 (2013.01); C01B 32/40 (2017.08); C07C 1/12 (2013.01); C07C 29/50 (2013.01); C10K 3/026 (2013.01); C25C 3/125 (2013.01); C01B 2203/0283 (2013.01); C01B 2203/06 (2013.01); C01B 2203/061 (2013.01)] 20 Claims
 
20. An integrated plant, comprising:
an electrolysis apparatus for production of aluminum by melt-electrolytic reduction of aluminum oxide, using at least one anode composed of a carbon-comprising material,
at least one device for purification and/or conditioning of an offgas stream from the electrolysis apparatus, and
at least one reactor for reaction of the offgas stream with hydrogen to form a synthesis gas and/or to form methane, and/or an apparatus for mixing the offgas stream with hydrogen; for subsequent utilization in a chemical or biotechnological plant to produce methanol, at least one alcohol, and/or at least one other chemical product of value,
wherein the integrated plant comprises at least two independent conduits, and
wherein a first offgas stream which has been cooled in an apparatus for heat exchange can be conveyed by the first conduit and, independently thereof, a second uncooled offgas stream can be conveyed directly from the electrolysis apparatus into the at least one device for purification and/or conditioning.