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1.发明授权公开(公告)号：US11434337B2
公开(公告)日：2022-09-06
申请号：US15654124
申请日：2017-07-19
Applicant: AGC Inc.
Inventor： Takayuki Kaneko , Hiromitsu Kusano , Yasushi Yamaki , Takuo Nishio
Abstract: To provide an ion exchange membrane for alkali chloride electrolysis which has a low membrane resistance and which is capable of reducing the electrolysis voltage during the alkali chloride electrolysis, while increasing the membrane strength.
An ion exchange membrane 1 for alkali chloride electrolysis wherein a reinforcing material 20 obtained by weaving with reinforcing yarns 22 and sacrificial yarns 24 is embedded in a fluoropolymer having ion exchange groups, the ion exchange membrane 1 comprises elution holes (28) formed by eluting at least a portion of a material of the sacrificial yarns 24, and in a cross section perpendicular to the length direction of the yarns, the total area (S) obtained by adding the cross-sectional area of an elution hole 28 and the cross-sectional area of a sacrificial yarn 24 remaining in the elution hole 28 is from 500 to 1,200 μm2, and the number (n) of elution holes 28 between adjacent reinforcing yarns 22 is at least 10.-
公开(公告)号：US11273435B2
公开(公告)日：2022-03-15
申请号：US15173916
申请日：2016-06-06
Applicant: AGC Inc.
Inventor： Hiromitsu Kusano , Takayuki Kaneko
Abstract: To provide a method for producing a fluorinated cation exchange membrane, by which a fluorinated cation exchange membrane having a high effect to suppress attachment of the gas to the surface on the cathode side and having an excellent resistance to dropping of inorganic particles from a gas-releasing layer provided on the cathode side can be obtained.
A method for producing a fluorinated cation exchange membrane 1 for electrolysis comprising, on at least the cathode side, a layer (α1) 12 containing a perfluorocarbon polymer (A) having carboxylic acid groups or precursor groups of carboxylic acid groups, and a gas-releasing layer (α2) 10 provided on the cathode side of the layer (α1) 12, which comprises applying to the surface of the layer (α1) 12 a coating liquid containing inorganic particles having an average secondary particle size of from 0.5 to 1.5 μm, a binder and a dispersion medium in a mass ratio of the binder to the total mass of the inorganic particles and the binder of from 0.15 to 0.3, to form the gas-releasing layer (α2) 10.-
3.发明授权公开(公告)号：US11447881B2
公开(公告)日：2022-09-20
申请号：US15491272
申请日：2017-04-19
Applicant: AGC Inc.
Inventor： Yasushi Yamaki , Takayuki Kaneko , Hiromitsu Kusano , Takuo Nishio , Kazuo Umemura
Abstract: To provide an ion exchange membrane for alkali chloride electrolysis for which membrane strength is increased while membrane resistance is reduced to reduce electrolysis voltage during alkali chloride electrolysis and which prevents peeling between layers (S) and a layer (C). The ion exchange membrane for alkali chloride electrolysis comprises a layer (C) which comprises a fluorinated polymer having carboxylic acid functional groups, at least two layers (S) which comprise a fluorinated polymer having sulfonic acid functional groups, and a reinforcing material, wherein the layers (S) include a layer (Sa) and a layer (Sb), the layer (Sa) is a layer which is adjacent to the layer (C), the layer (Sb) is a layer which is not adjacent to the layer (C), the reinforcing material is disposed in the layer (Sb) substantially in parallel to the layer (Sb) in a state not in contact with the layer (Sa), and the ion exchange capacity of the layer (Sa) is lower than the ion exchange capacity of the layer (Sb).
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公开(公告)号：US10703872B2
公开(公告)日：2020-07-07
申请号：US15909013
申请日：2018-03-01
Applicant: AGC Inc.
Inventor： Tamaki Chinsoga , Takuo Nishio , Yasushi Yamaki , Takayuki Kaneko
Abstract: To provide a method whereby it is possible to efficiently produce an ion exchange membrane for alkali chloride electrolysis, which has high current efficiency and high alkali resistance at the time of electrolyzing an alkali chloride. This is a method for producing an ion exchange membrane 1 for alkali chloride electrolysis, having a layer (C) 12 containing a fluorinated polymer (A) having carboxylic acid type functional groups, by immersing an ion exchange membrane precursor film having a precursor layer (C′) containing a fluorinated polymer (A′) having groups convertible to carboxylic acid type functional groups, in an aqueous alkaline solution comprising an alkali metal hydroxide, a water-soluble organic solvent and water, and subjecting the groups convertible to carboxylic acid type functional groups to hydrolysis treatment to convert them to carboxylic acid type functional groups, wherein the concentration of the water-soluble organic solvent is from 1 to 60 mass % in the alkaline aqueous solution (100 mass %); the proportion of structural units having carboxylic acid type functional groups in the fluorinated polymer (A) is from 14.00 to 14.50 mol %; and the resistivity in the layer (C) 12 is from 3.0×103 to 25.0×103 Ω·cm.
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公开(公告)号：US11020734B2
公开(公告)日：2021-06-01
申请号：US15491371
申请日：2017-04-19
Applicant: AGC Inc.
Inventor： Yasushi Yamaki , Takayuki Kaneko , Hiromitsu Kusano , Takuo Nishio
IPC: C25B13/08 , B01J39/05 , B01J39/20 , B01J47/12 , C08F214/26 , C08F216/14 , C25B9/10 , C08J5/22 , C25B9/23 , C25B1/46
Abstract: To provide an ion exchange membrane for alkali chloride electrolysis which has high membrane strength and low membrane resistance, thereby capable of reducing the electrolysis voltage during alkali chloride electrolysis. In this ion exchange membrane (1) for alkali chloride electrolysis, a reinforcing material 20 formed by weaving reinforcing yarns 22 and sacrificial yarns 24 is disposed in a layer (S) 14, and layer (S) 14 has elution portions 28 formed by elution of at least portions of the sacrificial yarns 24. In a cross section perpendicular to reinforcing yarns of the warp, the average distance (d1) from the center of a reinforcing yarn 22 to the center of the adjacent reinforcing yarn 22, the total area (P) obtained by adding the cross-sectional area of an elution portion 28 and the cross-sectional area of a sacrificial yarn 24 remaining in the elution portion 28, the number (n) of elution portions between adjacent reinforcing yarns 22, and the ion exchange capacity of a layer (Sa) located on the most anode side in the layer (S) 14 during alkali chloride electrolysis, are controlled to be within specific ranges, respectively.
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Patent Agency Ranking
公开(公告)号：US10781522B2
公开(公告)日：2020-09-22
申请号：US15909026
申请日：2018-03-01
Applicant: AGC Inc.
Inventor： Tamaki Chinsoga , Takuo Nishio , Yasushi Yamaki , Takayuki Kaneko
Abstract: To provide a production method whereby an ion exchange membrane for alkali chloride electrolysis can be obtained which has high current efficiency, little variation in current efficiency and high alkaline resistance. This is a method for producing an ion exchange membrane 1 having a layer (C) 12 containing a fluorinated polymer (A) having carboxylic acid type functional groups, by immersing an ion exchange membrane precursor film having a precursor layer (C′) containing a fluorinated polymer (A′) having groups convertible to carboxylic acid type functional groups, in an aqueous alkaline solution comprising an alkali metal hydroxide, a water-soluble organic solvent and water, and converting the groups convertible to carboxylic acid type functional groups to carboxylic acid functional groups, wherein the concentration of the water-soluble organic solvent is from 1 to 60 mass % in the aqueous alkaline solution (100 mass %); the temperature of the aqueous alkaline solution is at least 40° C. and less than 80° C.; and the proportion of structural units having carboxylic acid type functional groups in the fluorinated polymer (A) is from 13.0 to 14.50 mol % in all structural units (100 mol %) in the fluorinated polymer (A).
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7.发明申请公开(公告)号：US20190040538A1
公开(公告)日：2019-02-07
申请号：US16156360
申请日：2018-10-10
Applicant: AGC Inc.
Inventor： Yasushi Yamaki , Takayuki Kaneko , Hiromitsu Kusano , Takuo Nishio
Abstract: To provide an ion exchange membrane for alkali chloride electrolysis which is a membrane having a high water permeability and being capable of maintaining a low electrolysis voltage while suppressing the amount of water supplied to a cathode chamber to be minimum, and which is capable of forming an aqueous alkali hydroxide solution having a high caustic alkali quality. The ion exchange membrane for alkali chloride electrolysis comprises a layer 12 made of a fluorinated polymer having carboxylic acid functional groups, and a layer 14A and a layer 14B made of a fluorinated polymer having sulfonic acid functional groups, wherein a reinforcing material 20 containing reinforcing threads 22 is disposed between the layer 14A and the layer 14B, the thickness when dried, of the layer 12 is from 9 to 28 μm, the layer 14B includes a layer having an ion exchange capacity of from 1.3 to 2.5 meq/g, the thickness when dried, of the layer 14B is from 6 to 100 μm, the layer 14A includes a layer having an ion exchange capacity of from 0.9 to 1.25 meq/g, and the thickness when dried, of the layer 14A is from 40 to 110 μm.
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公开(公告)号：US20230253596A1
公开(公告)日：2023-08-10
申请号：US18133606
申请日：2023-04-12
Applicant: AGC INC
Inventor： Shintaro HAYABE , Kosuke Sumikura , Takayuki Kaneko , Takuo Nishio
IPC: H01M8/1065 , H01M8/18 , H01M8/1039 , C25B13/08
CPC classification number: H01M8/1065 , H01M8/188 , H01M8/1039 , C25B13/08
Abstract: To provide an electrolyte membrane wherein pinholes are less likely to occur even when used in a cell having an anode and a cathode under voltage for a prolonged period of time, as well as an electrolysis apparatus and a redox flow battery which contain the membrane. An electrolyte membrane comprising a fluorinated polymer containing ion-exchange groups and a woven fabric, wherein said woven fabric consists of yarns A extending in one direction and yarns B extending in a direction orthogonal to said yarns A, the aspect ratio YACA2/YACA1 exceeds 1 and is larger than the aspect ratio YAA2/YAA1, and the aspect ratio YACB2/YACB1 exceeds 1 and is larger than the aspect ratio YAB2/YAB1. (YACA2, YACA1, YAA2, YAA1, YACB2, YACB1, YAB2 and YAB1 are as defined in the specification.)
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公开(公告)号：US10926253B2
公开(公告)日：2021-02-23
申请号：US15728694
申请日：2017-10-10
Applicant: AGC Inc.
Inventor： Takayuki Kaneko , Hiromitsu Kusano , Yasushi Yamaki , Takuo Nishio
IPC: B01J39/05 , B01J39/20 , B01J47/12 , C25B13/08 , D02G3/36 , D02G3/04 , B01J39/04 , C08J5/22 , C25B13/02 , C25B1/46 , C25B9/08
Abstract: To provide a process for producing an ion exchange membrane for electrolysis which has a low membrane resistance and which is capable of reducing the electrolysis voltage during the electrolysis, even if the membrane strength is increased, an ion exchange membrane for electrolysis, a precursor membrane of an ion exchange membrane for electrolysis, and an electrolysis apparatus.
In a fluorinated polymer having groups convertible to ion exchange groups, a reinforcing fabric 20A formed by weaving covered yarns 21 each comprising a reinforcing fabric 22 and a sacrificial material covering at least a portion of the outer peripheral surface of the reinforcing yarn 22, to produce a precursor membrane of an ion exchange membrane, and from the precursor membrane, at least a portion of the sacrificial material in the reinforcing fabric is eluted to form a reinforcing material and at the same time, the groups convertible to ion exchange groups are converted to ion exchange groups, to produce an ion exchange membrane for electrolysis.-
10.发明授权公开(公告)号：US10669641B2
公开(公告)日：2020-06-02
申请号：US16156320
申请日：2018-10-10
Applicant: AGC Inc.
Inventor： Yasushi Yamaki , Takayuki Kaneko , Hiromitsu Kusano , Takuo Nishio
Abstract: To provide an ion exchange membrane for alkali chloride electrolysis whereby it is possible to make the electrolysis voltage low and the current efficiency high at the time of performing electrolysis of an alkali chloride; a method for its production; and an alkali chloride electrolysis apparatus using it. The ion exchange membrane for alkali chloride electrolysis has a layer (C) comprising a fluorinated polymer having carbonic acid functional groups, and a layer (S) comprising a fluorinated polymer having sulfonic acid functional groups; a reinforcing material containing reinforcing threads is disposed in the layer (S); and when measured after the ion exchange membrane for alkali chloride electrolysis is immersed and held in a 32 mass % sodium hydroxide aqueous solution warmed at 90° C. for 16 hours and subsequently immersed in a 32 mass % sodium hydroxide aqueous solution at 25° C. for 3 hours, the AC resistance value A of the layer (S) and the AC resistance value B of the layer (C) satisfy the following formulae at the same time: 1(Ω·cm2)≤A≤10(Ω·cm2) and 200(Ω·cm2)≤B≤450(Ω·cm2).
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