Co2 electroreduction to multi-carbon products in strong acid
US-2024093390-A1 · Mar 21, 2024 · US
Ion exchange membrane and electrolyzer
US2020173046A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2020173046-A1 |
| Application number | US-201916671535-A |
| Country | US |
| Kind code | A1 |
| Filing date | Nov 1, 2019 |
| Priority date | Nov 5, 2018 |
| Publication date | Jun 4, 2020 |
| Grant date | — |
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Abstract
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[Problem to be solved] Provided is an ion exchange membrane having both excellent electrolytic characteristics and excellent gas zone damage resistance. [Solution] An ion exchange membrane comprising: a layer A comprising a fluorine-containing polymer having a sulfonic acid group; and a layer B comprising a fluorine-containing polymer having a carboxylic acid group, wherein the layer B has a thickness of 5 to 30 μm, and the layer B has an ion cluster diameter of 1.8 to 2.48 μm.
First claim
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1 . An ion exchange membrane comprising: a layer A comprising a fluorine-containing polymer having a sulfonic acid group; and a layer B comprising a fluorine-containing polymer having a carboxylic acid group, wherein the layer B has a thickness of 5 to 30 μm, and the layer B has an ion cluster diameter of 1.8 to 2.48 nm. 2 . The ion exchange membrane according to claim 1 , wherein the layer B has an ion exchange capacity of 0.76 to 1.30 mEq/g. 3 . The ion exchange membrane according to claim 1 , wherein the layer A comprises a polymer of a compound represented by the following formula (2b); and the layer B comprises a polymer of a compound represented by the following formula (3b): CF 2 ═CF—(OCF 2 CYF) a —O—(CF 2 ) b —SO 2 M (2b) wherein a represents an integer of 0 to 2, b represents an integer of 1 to 4, Y represents —F or —CF 3 , and M represents an alkali metal; and CF 2 ═CF—(OCF 2 CYF) c —O—(CF 2 ) d —COOM (3b) wherein c represents an integer of 0 to 2, d represents an integer of 1 to 4, Y represents —F or —CF 3 , R represents —CH 3 , —C 2 H 5 , or —C 3 H 7, and M represents an alkali metal. 4 . The ion exchange membrane according to claim 2 , wherein the layer A comprises a polymer of a compound represented by the following formula (2b); and the layer B comprises a polymer of a compound represented by the following formula (3b): CF 2 ═CF—(OCF 2 CYF) a —O—(CF 2 ) b —SO 2 M (2b) wherein a represents an integer of 0 to 2, b represents an integer of 1 to 4, Y represents —F or —CF 3 , and M represents an alkali metal; and CF 2 ═CF—(OCF 2 CYF) c —O—(CF 2 ) d —COOM (3b) wherein c represents an integer of 0 to 2, d represents an integer of 1 to 4, Y represents —F or —CF 3 , R represents —CH 3 , —C 2 H 5 , or 'C 3 H 7, and M represents an alkali metal. 5 . An electrolyzer comprising the ion exchange membrane according to claim 1 . 6 . An electrolyzer comprising the ion exchange membrane according to claim 2 . 7 . An electrolyzer comprising the ion exchange membrane according to claim 3 . 8 . An electrolyzer comprising the ion exchange membrane according to claim 4 .
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Classifications
fluorine containing heterogeneous membranes · CPC title
containing fluorine · CPC title
Homopolymers or copolymers of tetrafluoroethylene · CPC title
Homopolymers or copolymers of tetrafluoroethylene · CPC title
- C25B13/08Primary
based on organic materials · CPC title
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- What does patent US2020173046A1 cover?
- [Problem to be solved] Provided is an ion exchange membrane having both excellent electrolytic characteristics and excellent gas zone damage resistance. [Solution] An ion exchange membrane comprising: a layer A comprising a fluorine-containing polymer having a sulfonic acid group; and a layer B comprising a fluorine-containing polymer having a carboxylic acid group, wherein t…
- Who is the assignee on this patent?
- Asahi Chemical Ind
- What technology area does this patent fall under?
- Primary CPC classification C25B13/08. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Jun 04 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).