Method for producing a bisphenol
US-2017327447-A1 · Nov 16, 2017 · US
Ion exchange membrane
US2018141035A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018141035-A1 |
| Application number | US-201615575036-A |
| Country | US |
| Kind code | A1 |
| Filing date | May 16, 2016 |
| Priority date | May 18, 2015 |
| Publication date | May 24, 2018 |
| Grant date | — |
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Abstract
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The ion exchange membrane according to the present invention comprises 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 value of an ion cluster diameter distribution M represented by the following formula (B) of greater than 10: M =( a 0 ) 2 /(σ) 2 (B) wherein M represents an ion cluster diameter distribution, a 0 represents an average ion cluster radius, and σ represents a standard deviation of an ion cluster radius.
First claim
Opening claim text (preview).
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 value of an ion cluster diameter distribution M represented by the following formula (B) of greater than 10: M =( a 0 ) 2 /(σ) 2 (B) wherein M represents an ion cluster diameter distribution, a 0 represents an average ion cluster radius, and σ represents a standard deviation of an ion cluster radius. 2 . The ion exchange membrane according to claim 1 , wherein the layer B has an ion cluster diameter of 2.5 to 3.5 nm. 3 . The ion exchange membrane according to claim 1 , wherein the layer A has an ion cluster diameter of 3.0 to 4.5 nm. 4 . The ion exchange membrane according to claim 1 , wherein the layer A has a thickness of 50 to 180 μm. 5 . The ion exchange membrane according to claim 1 , wherein the layer B has a thickness of 5 to 30 μm. 6 . The ion exchange membrane according to claim 1 , wherein the layer A comprises a polymer of a compound represented by the following formula (2); and the layer B comprises a polymer of a compound represented by the following formula (3): CF 2 ═CF—(OCF 2 CYF) a —O—(CF 2 ) b —SO 2 F formula (2) wherein a represents an integer of 0 to 2, b represents an integer of 1 to 4, and Y represents —F or —CF 3 ; and CF 2 ═CF—(OCF 2 CYF) c —O—(CF 2 ) d —COOR formula (3) wherein c represents an integer of 0 to 2, d represents an integer of 1 to 4, Y represents —F or —CF 3 , and R represents —CH 3 , —C 2 H 5 , or —C 3 H 7 . 7 . An electrolytic cell comprising the ion exchange membrane according to claim 1 .
Assignees
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Classifications
- B01J39/04Primary
Processes using organic exchangers · CPC title
Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features · CPC title
Homopolymers or copolymers of tetrafluoroethylene · CPC title
containing fluorine atoms · CPC title
containing fluorine atoms · CPC title
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- What does patent US2018141035A1 cover?
- The ion exchange membrane according to the present invention comprises 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 value of an ion cluster diameter distribution M represented by the following formula (B) of greater than 10: M =( a 0 ) 2…
- Who is the assignee on this patent?
- Asahi Chemical Ind
- What technology area does this patent fall under?
- Primary CPC classification B01J39/04. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu May 24 2018 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).