US4533453A
Expired / Lapsed
US
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Ion exchange membrane electrolytic cell
Assignee: AGC Inc
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Filing: 1982-03-05
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Granted: 1985-08-06
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Expires: 2002-03-05
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. A gas and liquid permeable porous non-electrode layer composed of non-oxide ceramics particles is bonded to at least one side of the ion exchange membrane. With use of such a membrane, the cell voltage can considerably reduced in the electrolysis of water, an alkali metal halide, an alkali metal carbonate, etc.
Inventors
- 👤 Yoshio Oda
- 👤 Takeshi Morimoto
- 👤 Kohji Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:28
CPC Classifications
C; C25; C25B; C25B13/00; C25B9/00; C25B9/17; C25B9/19
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
69 words
In an ion exchange membrane electrolytic cell which comprises an anode, a cathode, an anode compartment and a cathode compartment partitioned by an ion exchange membrane, the improvement comprising: the surface of said ion exchange membrane on the cathode side of said cell having bonded thereto a gas and liquid permeable porous layer composed of non-oxide ceramic particles, said particle layer not functioning as an electrode of said cell.
Claim 2
Dependent Claim
69 words
In an ion exchange membrane electrolytic cell which comprises an anode, a cathode, an anode compartment and a cathode compartment partitioned by an ion exchange membrane, the improvement comprising: the surface of said ion exchange membrane on the cathode side of said cell having bonded thereto a gas and liquid permeable porous layer composed of non-oxide ceramic particles, said particle layer not functioning as an electrode of said cell.
Claim 3
Dependent Claim
22 words
The electrolytic cell of claim 1, wherein the non-oxide ceramic is silicon carbide, boron carbide, silicon nitride, boron nitride or molybdenum silicide.
Claim 4
Dependent Claim
26 words
The electrolytic cell of claim 1, wherein the gas and liquid permeable porous layer has a porosity of 10-99% and a thickness of 0.01 to 300.
Claim 5
Dependent Claim
29 words
The electrolytic cell of claim 1, wherein the non-oxide ceramic particles are bonded to the surface of the membrane in an amount of 0.001 to 50 mg/cm 2 .
Claim 6
Dependent Claim
27 words
The electrolytic cell of claim 1, wherein the non-oxide ceramic particles are bonded to the surface of the membrane with a binder composed of a fluorinated polymer.
Claim 7
Dependent Claim
28 words
The electrolytic cell of claim 1, wherein the ion exchange membrane is a fluorine-containing ion exchange membrane having sulfonic acid groups, carboxylic acid groups, or phosphoric acid groups.
Claim 8
Dependent Claim
25 words
The electrolytic cell of claim 1, wherein the anode or cathode or both of said cell is positioned in contact with the ion exchange membrane.
Claim 9
Dependent Claim
18 words
The electrolytic cell of claim 1, wherein the cathode is positioned in contact with the ion exchange membrane.
Claim 10
Dependent Claim
46 words
The electrolytic cell of claim 1, wherein the anode and the cathode are an expanded metal with openings having a major length of 1.0 to 10 mm and a minor length of 0.5 to 10 mm, said openings constituting 30-90% of the area of the electrode.
Claim 11
Dependent Claim
35 words
The elctrolytic cell of claim 1, wherein the anode and the cathode are each a metal piece having holes punched therein, the openings in said metal pieces constituting 30-90% of the area of each electrode.
Claim 12
Dependent Claim
35 words
The electrolytic cell of claim 1, wherein said cell is provided with a plurality of foraminous electrodes of different surface area openings, with the electrodes of open surface area being positioned closer to the membrane.
Claim 13
Dependent Claim
37 words
The electrolytic cell of claim 1 wherein said cell is employed in the electrolysis of water, or the electrolysis of an aqueous solution of an acid, a base, an alkali metal halide or an alkali metal carbonate.
Claim 14
Dependent Claim
88 words
In an ion exchange membrane electrolytic cell which comprises an anode, a cathode, an anode compartment and a cathode compartment partitioned by an ion exchange membrane, the improvement comprising: the surface of said ion exchange membrane on the cathode side of said cell having bonded thereto a gas and liquid permeable porous layer composed of non-oxide ceramic particles, said particle layer not functioning as an electrode of said cell and the voltage characteristics of said cell as a function of varying pressure on said membrane being essentially constant.
Claim 15
Dependent Claim
88 words
In an ion exchange membrane electrolytic cell which comprises an anode, a cathode, an anode compartment and a cathode compartment partitioned by an ion exchange membrane, the improvement comprising: the surface of said ion exchange membrane on the cathode side of said cell having bonded thereto a gas and liquid permeable porous layer composed of non-oxide ceramic particles, said particle layer not functioning as an electrode of said cell and the voltage characteristics of said cell as a function of varying pressure on said membrane being essentially constant.
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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) | 1988-08-05 | 1989-02-04 | 1989-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-05 | 1993-02-04 | 1993-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-05 | 1997-02-04 | 1997-08-06 | $7700.00 | Window Closed / Lapsed |