Patent US2255503A successfully refreshed from Google Patents.
Patent US4496451A successfully refreshed from Google Patents.
US4496451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion exchange membrane manufacture for electrolytic cell
Assignee: AGC Inc
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Filing: 1982-05-11
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Granted: 1985-01-29
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Expires: 2002-05-11
Abstract
Abstract An ion exchange membrane electrolytic cell comprises an anode, a cathode, an anode compartment and a cathode compartment partitioned by an ion exchange membrane; an improvement characterized in that a gas and liquid permeable porous non-electrode layer is bonded to at least one of surfaces of said ion exchange membrane and said porous non-electrode layer is formed by coating electric non-conductive or conductive particles on the surface of a support to form a thin layer, transferring said thin layer onto the surface of said membrane and bonding said thin layer to said membrane by the application of heat and pressure.
Inventors
- 👤 Tsuneji Ishii
- 👤 Hiroaki Ito
- 👤 Takamichi Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:54
CPC Classifications
C; C25; C25B; C25B9/00; C25B9/60; C25B9/17; C25B9/19; C25B9/23
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
97 words
A method of manufacturing an ion exchange membrane for use in an electrolytic cell comprising an anode, a cathode, an anode compartment, a cathode compartment, and a gas and liquid permeable porous non-electrode layer bonded to at least one surface of said ion exchange member, which comprises: coating electric non-conductive or conductive particles on the surface of a support to form a thin layer, drying the thin layer on the support, transferring said dried thin layer onto said surface of said membrane, and bonding said thin layer to said membrane by the application of heat and pressure.
Claim 2
Independent Claim
97 words
A method of manufacturing an ion exchange membrane for use in an electrolytic cell comprising an anode, a cathode, an anode compartment, a cathode compartment, and a gas and liquid permeable porous non-electrode layer bonded to at least one surface of said ion exchange member, which comprises: coating electric non-conductive or conductive particles on the surface of a support to form a thin layer, drying the thin layer on the support, transferring said dried thin layer onto said surface of said membrane, and bonding said thin layer to said membrane by the application of heat and pressure.
Claim 3
Dependent Claim
28 words
The method of claim 1 wherein the gas and liquid permeable porous non-electrode layer has a porosity of 10 to 99% and a thickness of 0.01 to 200μ.
Claim 4
Dependent Claim
32 words
The method of claim 1 or 2 wherein the electric non-conductive or conductive particles are bonded to the surface of the membrane in an amount of 0.001 to 50 mg/cm 2 .
Claim 5
Dependent Claim
35 words
The method of claim 1, or 2 wherein the electric non-conductive or conductive particles are made of an inorganic or organic material having corrosion resistance to an electrolyte and an evolved gas at an electrode.
Claim 6
Dependent Claim
11 words
The method of claim 1 wherein said support is a film.
Claim 7
Dependent Claim
11 words
The method of claim 1 wherein said support is a roll.
Claim 8
Dependent Claim
30 words
The method according to claim 1, 5 or 6 wherein the electric non-conductive or conductive particles are coated on the surface of the support in the form of a paste.
Claim 9
Dependent Claim
28 words
The method of claim 1 wherein the electric non-conductive or conductive particles are bonded to the surface of the membrane with a binder composed of a fluorinated polymer.
Claim 10
Dependent Claim
13 words
The method of claim 8 wherein the fluorinated polymer is a tetrafluoroethylene polymer.
Claim 11
Dependent Claim
45 words
The method of claim 1 wherein the electric non-conductive or conductive particles are made of a metal in IV-A Group, IV-B Group, V-B Group, ion Group or chromium, manganese or boron or an alloy, an oxide, a hydroxide, nitride or a carbide of said metal.
Claim 12
Dependent Claim
27 words
The method of claim 1 wherein said membrane has cation exchange groups selected from the group consisting of sulfonic acid groups, carboxylic acid groups and phosphoric groups.
Claim 13
Dependent Claim
19 words
The method of claim 1 wherein said membrane has an ion exchange capacity of 0.5 to 4.0 meq/g-dry polymer.
Claim 14
Dependent Claim
14 words
The method of claim 1 wherein said membrane is made of a perfluorocarbon polymer.
Claim 15
Dependent Claim
32 words
The method of claim 1 wherein said coating consists of coating a paste comprising electric non-conductive or conductive particles on a supporting film to form a thin layer and drying the paste.
Claim 16
Dependent Claim
130 words
The method of claim 1 wherein said membrane is made of a perfluro carbon polymer which has the following units (M) and (N): ##STR3## wherein X represents a fluorine, chlorine or hydrogen atom or --CF 3 ; X' represents X or CF 3 --CH 2 )m wherein m represents an integer from 1 to 5; Y is selected from the group consisting of ##STR4## wherein x, y and z independently represent an integer from 1 to 10 and Z and Rf independently represent --F or a C 1 -C 10 perfluoro alkyl group; and A represents --COOM or --SO 3 M or a functional group which is convertible into --COOM or --SO 3 M by a hydrolysis or a neutralization reaction wherein M represents hydrogen or an alkali metal atom.
Claim 17
Dependent Claim
66 words
The method of claim 15 wherein said functional group which is convertible into --COOM or --SO 3 M is --CN, --COF, --COOR 1 , --SO 2 F, --CONR 2 R 3 or --SO 2 NR 2 R 3 independently wherein R 1 represents a C 1 -C 10 alkyl group and R 2 and R 3 represent H or a C 1 -C 10 alkyl group.
Claim 18
Independent Claim
98 words
A method of manufacturing an ion exchange membrane for use in an electrolytic cell comprising an anode, a cathode, an anode compartment, a cathode compartment, and a gas and liquid permeable porous non-electrode layer bonded to at least one surface of said ion exchange member, which comprises: coating a paste comprising electric non-conductive or conductive particles onto a supporting film to form a thin layer, drying the thin layer on the support, transferring said dried thin layer onto said surface of said membrane, and bonding said thin layer to said membrane by the application of heat and pressure.
Claim 19
Independent Claim
98 words
A method of manufacturing an ion exchange membrane for use in an electrolytic cell comprising an anode, a cathode, an anode compartment, a cathode compartment, and a gas and liquid permeable porous non-electrode layer bonded to at least one surface of said ion exchange member, which comprises: coating a paste comprising electric non-conductive or conductive particles onto a supporting film to form a thin layer, drying the thin layer on the support, transferring said dried thin layer onto said surface of said membrane, and bonding said thin layer to said membrane by the application of heat and pressure.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-29 | 1988-07-30 | 1989-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-29 | 1992-07-30 | 1993-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-29 | 1996-07-30 | 1997-01-29 | $7700.00 | Window Closed / Lapsed |