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公开(公告)号：US20240384426A1
公开(公告)日：2024-11-21
申请号：US18688762
申请日：2022-08-19
Applicant: EVONIK OPERATIONS GMBH
Inventor： Philip Heinrich REINSBERG , Michael HORN , Rüdiger TEUFERT , Marc WEINER
Abstract: The invention relates to a method for producing an alkali metal alcoholate solution L1 in an electrolysis cell E which comprises at least one cathode chamber KK, at least one anode chamber KA, and at least one central chamber KM lying therebetween. The interior IKK of the cathode chamber KK is separated from the interior IKM of the central chamber KM by a separating wall W comprising at least one alkali-cation-conductive solid ceramic electrolyte (=“AFK”) F (e.g. NaSICON). F has the surface OF. A part OA/MK of the surface OF directly contacts the interior IKM, and a part OKK of the surface OF directly contacts the interior IKK. The surface OA/MK and/or the surface OKK comprises at least one part of a surface OFΔ. OFΔ is produced from a pre-treatment step in which F is produced from an AFK F′ comprising the surface OF′. For this purpose, AFK is removed from F′ by carrying out a compressed air blasting process on the surface OF′ using a solid blasting agent N, and the AFK F with the surface OF comprising the surface OFΔ formed by the compressed air blasting process is obtained. During the electrolysis process for producing the alkali metal alcoholates with F instead of F′, an improved conductivity is provided, whereby for a constant current density, a lower voltage can be used.
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公开(公告)号：US20240392451A1
公开(公告)日：2024-11-28
申请号：US18688757
申请日：2022-08-19
Applicant: EVONIK OPERATIONS GMBH
Inventor： Philip Heinrich REINSBERG , Michael HORN , Rüdiger TEUFERT , Marc WEINER
Abstract: The invention relates to a method for producing an alkali metal alcoholate solution L1 in an electrolysis cell E which comprises at least one cathode chamber KK, at least one anode chamber KA, and at least one central chamber KM lying therebetween. The interior IKK of the cathode chamber KK is separated from the interior IKM of the central chamber KM by a separating wall W comprising at least one alkali-cation-conductive solid ceramic electrolyte (=“AFK”) F (e.g. NaSICON). F has the surface OF. A part OA/MK of the surface OF directly contacts the interior IKM, and a part OKK of the surface OF directly contacts the interior IKK. The surface OA/MK and/or the surface OKK comprises at least one part of a surface OFΔ. OFΔ is produced from a pre-treatment step in which F is produced from an AFK F′ comprising the surface OF′. For this purpose, AFK is removed from F′ by etching the surface OF′ using an etching agent Ä, and the AFK F with the surface OF comprising the surface OFΔ formed by the etching process is obtained. During the electrolysis process for producing the alkali metal alcoholates with F instead of F′, an improved conductivity is provided, whereby for a constant current density, a lower voltage can be used.
