US4666574A
Expired / Lapsed
US
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Ion exchange membrane cell and electrolytic process using thereof
Assignee: AGC Inc
•
Filing: 1980-11-10
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Granted: 1987-05-19
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Expires: 2000-11-10
Abstract
Abstract An ion exchange membrane cell comprises an anode, a cathode, an anode compartment and a cathode compartment formed by partitioning by an ion exchange membrane. A gas and liquid permeable porous non-electrode layer is bonded at least one of surface of said ion exchange membrane. An ion exchange membrane comprises a gas and liquid permeable porous non-electrode layer which is bonded to at least one surface of said membrane. An aqueous solution of an alkali metal chloride is electrolyzed in an electrolytic cell comprising an anode, a cathode, an anode compartment and a cathode compartment formed by partitioning with an ion exchange membrane wherein a gas and liquid permeable porous non-electrode layer is bonded to at least one of surfaces of said ion exchange membrane and an aqueous solution of an alkali metal chloride is fed into said anode compartment to form chlorine on said anode and to form an alkali metal hydroxide in said cathode compartment.
Inventors
- 👤 Yoshio Oda
- 👤 Takeshi Morimoto
- 👤 Kohji Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:55
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/34; C25B1/46; C25B11/00; C25B11/02; C25B9/00; C25B9/17; C25B9/19
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
68 words
An ion exchange membrane cell which comprises an anode, a cathode, an anode compartment and a cathode compartment formed by partitioning the cell with an ion exchange membrane comprising a gas and liquid permeable porous particulate non-electrode layer bonded to at least one surface of said ion exchange membrane wherein at least one of said anode and said cathode is in contact with said porous particulate non-electrode layer.
Claim 2
Dependent Claim
68 words
An ion exchange membrane cell which comprises an anode, a cathode, an anode compartment and a cathode compartment formed by partitioning the cell with an ion exchange membrane comprising a gas and liquid permeable porous particulate non-electrode layer bonded to at least one surface of said ion exchange membrane wherein at least one of said anode and said cathode is in contact with said porous particulate non-electrode layer.
Claim 3
Dependent Claim
25 words
The electrolytic cell of claim 1 wherein said porous non-electrode layer has a porosity of 10 to 99% and a thickness of 0.01 to 200μ.
Claim 4
Dependent Claim
20 words
The electrolytic cell of claim 1 or 2 wherein said porous non-electrode layer comprises non-conductive material which is electrochemically inactive.
Claim 5
Dependent Claim
29 words
The electrolytic cell of claim 1 or 2 wherein said porous non-electrode layer is made of a conductive material which has a higher over-voltage than that of the electrode.
Claim 6
Dependent Claim
26 words
The electrolytic cell of claim 1, wherein said porous non-electrode layer comprises non-conductive or conductive particles in an amount of 0.01 to 30 mg/cm 2 .
Claim 7
Dependent Claim
24 words
The electrolytic cell of claim 5 wherein said porous non-electrode layer is formed by bonding said non-conductive or conductive particles with a fluorinated polymer.
Claim 8
Dependent Claim
12 words
The electrolytic cell of claim 6 wherein said fluorinated polymer is polytetrafluoroethylene.
Claim 9
Dependent Claim
22 words
The electrolytic cell of claim 7 wherein said fluorinated polymer is modified tetrafluoroethylene copolymerized with a fluorinated monomer having a acid group.
Claim 10
Dependent Claim
28 words
The electrolytic cell of claim 5 wherein said porous non-electrode layer is formed by mixing said electric non-conductive or conductive particles with a water soluble viscosity controlling agent.
Claim 11
Dependent Claim
22 words
The electrolytic cell of claim 9 wherein said viscosity controling agent is selected from the group consisting of cellulose derivatives and glycols.
Claim 12
Dependent Claim
46 words
The electrolytic cell of claim 3 wherein said electric non-conductive material is selected from the group consisting of an oxide, a hydroxide, a nitride or a carbide of metals in IV-A Group, IV-B Group, V-B Group, VI-B Group, iron Group, aluminum, manganese, antimony and alloys thereof.
Claim 13
Dependent Claim
18 words
The electrolytic cell of claim 11 wherein said material is a hydrogel of a metal oxide or hydroxide.
Claim 14
Dependent Claim
14 words
The electrolytic cell of claim 11 wherein said material is a molten metal oxide.
Claim 15
Dependent Claim
36 words
The electrolytic cell of claim 4 wherein said electric conductive material is selected from the group consisting of metals in IV-A Group, IV-B Group, V-B Group, VI-B Group, iron Group, aluminum, manganese, antimony and alloy thereof.
Claim 16
Dependent Claim
16 words
The electrolytic cell of claim 14 wherein said material is titanium, tantalum, carbon, nickel or silver.
Claim 17
Dependent Claim
33 words
The electrolytic cell of claim 5 or 6 wherein said porous non-electrode layer is formed by screen-printing a paste of a non-conductive or conductive material on a surface of said ion exchange membrane.
Claim 18
Dependent Claim
24 words
The electrolytic cell of claim 1 or 2, wherein said anode or said cathode is a porous plate, a mesh or an expanded metal.
Claim 19
Dependent Claim
26 words
The electrolytic cell of claim 17 wherein said anode comprises a valve metal coated with a platinum group metal or electrically conductive platinum group metal oxide.
Claim 20
Dependent Claim
25 words
The electrolytic cell of claim 17 wherein said cathode comprises iron group metal, Raney nickel, stabilized Raney nickel, stainless steel, stainless steel or nickel rhodanide.
Claim 21
Dependent Claim
32 words
The electrolytic cell of claim 1 or 2 wherein said ion exchange membrane is a cation exchange membrane comprising fluorinated polymer containing sulfonic acid groups, carboxylic acid groups or phosphoric acid groups.
Claim 22
Independent Claim
96 words
A method of electrolyzing an alkali metal chloride solution in a cell comprising an anode in an anode compartment and a cathode in a cathode compartment separated by an ion exchange membrane having a porous, non-catalytic layer of particles on at least one surface of said ion exchange membrane wherein at least one of said anode and cathode contacts said porous, non-catalytic layer of particles, the layer of particles having a higher overvoltage than the contacting electrode, passing an electrical current from anode to cathode evolving chlorine at the anode and hydroxyl ions at the cathode.
Claim 23
Independent Claim
96 words
A method of electrolyzing an alkali metal chloride solution in a cell comprising an anode in an anode compartment and a cathode in a cathode compartment separated by an ion exchange membrane having a porous, non-catalytic layer of particles on at least one surface of said ion exchange membrane wherein at least one of said anode and cathode contacts said porous, non-catalytic layer of particles, the layer of particles having a higher overvoltage than the contacting electrode, passing an electrical current from anode to cathode evolving chlorine at the anode and hydroxyl ions at the cathode.
Claim 24
Independent Claim
80 words
A method of electrolyzing an alkali metal chloride solution in a cell comprising an anode in an anode compartment and a cathode in a cathode compartment separated by an ion exchange membrane in contact with a porous non-electrode layer comprising polytetrafluoroethylene and a non-catalytic, electrically non-conductive, inorganic particulate material dispersed through the porous layer wherein said cathode contacts said porous layer, passing an electrical current from anode to cathode, evolving chlorine at the anode and hydroxyl ions at the cathode.
Claim 25
Independent Claim
80 words
A method of electrolyzing an alkali metal chloride solution in a cell comprising an anode in an anode compartment and a cathode in a cathode compartment separated by an ion exchange membrane in contact with a porous non-electrode layer comprising polytetrafluoroethylene and a non-catalytic, electrically non-conductive, inorganic particulate material dispersed through the porous layer wherein said cathode contacts said porous layer, passing an electrical current from anode to cathode, evolving chlorine at the anode and hydroxyl ions at the cathode.
Claim 26
Independent Claim
93 words
A method of electrolyzing an alkali metal chloride solution in a cell comprising an anode in and anode compartment and a cathode in a cathode compartment separated by an ion exchange membrane in contact with a porous non-electrode matrix comprising a polytetrafluoroethylene and a non-catalytic, electrically conductive inorganic particulate material dispersed through the porous matrix wherein said cathode contacts said porous layer and said inorganic material has a higher overvoltage than the contacting electrode, passing an electrical current from anode to cathode, evolving chlorine at the anode and hydroxyl ions at the cathode.
Claim 27
Independent Claim
93 words
A method of electrolyzing an alkali metal chloride solution in a cell comprising an anode in and anode compartment and a cathode in a cathode compartment separated by an ion exchange membrane in contact with a porous non-electrode matrix comprising a polytetrafluoroethylene and a non-catalytic, electrically conductive inorganic particulate material dispersed through the porous matrix wherein said cathode contacts said porous layer and said inorganic material has a higher overvoltage than the contacting electrode, passing an electrical current from anode to cathode, evolving chlorine at the anode and hydroxyl ions at the cathode.
Claim 28
Independent Claim
83 words
A method of electrolyzing an alkali metal chloride solution in a cell comprising an anode in an anode compartment and a cathode in a cathode compartment separated by an ion exchange membrane having a porous particulate electroconductive, non-catalytic layer on the cathode surface of said ion exchange membrane wherein said cathode contacts said porous, electroconductive, non-catalytic layer and said porous electroconductive, non-catalytic layer has a higher hydrogen overvoltage than the contacting cathode, evolving chlorine at the anode and hydroxyl ions at the cathode.
Claim 29
Independent Claim
83 words
A method of electrolyzing an alkali metal chloride solution in a cell comprising an anode in an anode compartment and a cathode in a cathode compartment separated by an ion exchange membrane having a porous particulate electroconductive, non-catalytic layer on the cathode surface of said ion exchange membrane wherein said cathode contacts said porous, electroconductive, non-catalytic layer and said porous electroconductive, non-catalytic layer has a higher hydrogen overvoltage than the contacting cathode, evolving chlorine at the anode and hydroxyl ions at the cathode.
Claim 30
Independent Claim
212 words
A method of electrolyzing sodium chloride solution in a cell comprising: a platinum guaze anode in an anode compartment a nickel guaze cathode in a cathode compartment separated by a 250μ thick ion exchange membrane comprising a hydrolyzed copolymer of CF 2 ═CF 2 and CF 2 ═CFO(CF 2 ) 3 --COOCH 3 having an ion exchange capacity of 1.45 meq/g resin wherein at least one of the cathode or anode surfaces of said ion exchange membrane contains a porous non-electrode layer comprising particulate material, when said porous layer is adhered to the cathode surface of said ion exchange membrane said particulate material is selected from the group consisting of nickel oxide, and tin oxide and when said porous layer is adhered to the anode surface of said ion exchange membrane the particulate material is selected from the group consisting of tin oxide and titanium oxide wherein when said porous layer is on the cathode surface of the ion exchange membrane, the cathode is in contact with said porous layer and when said porous layer is on the anode side of the ion exchange membrane the anode is in contact with said porous layer, passing electrical current from anode to cathode, evolving chlorine at the anode and hydroxyl ions at the cathode.
Claim 31
Independent Claim
212 words
A method of electrolyzing sodium chloride solution in a cell comprising: a platinum guaze anode in an anode compartment a nickel guaze cathode in a cathode compartment separated by a 250μ thick ion exchange membrane comprising a hydrolyzed copolymer of CF 2 ═CF 2 and CF 2 ═CFO(CF 2 ) 3 --COOCH 3 having an ion exchange capacity of 1.45 meq/g resin wherein at least one of the cathode or anode surfaces of said ion exchange membrane contains a porous non-electrode layer comprising particulate material, when said porous layer is adhered to the cathode surface of said ion exchange membrane said particulate material is selected from the group consisting of nickel oxide, and tin oxide and when said porous layer is adhered to the anode surface of said ion exchange membrane the particulate material is selected from the group consisting of tin oxide and titanium oxide wherein when said porous layer is on the cathode surface of the ion exchange membrane, the cathode is in contact with said porous layer and when said porous layer is on the anode side of the ion exchange membrane the anode is in contact with said porous layer, passing electrical current from anode to cathode, evolving chlorine at the anode and hydroxyl ions at the cathode.
Claim 32
Dependent Claim
68 words
An electrolysis cell comprising an anode in an anode compartment and a cathode in a cathode compartment separated by an ion exchange membrane having a porous, non-catalytic layer of particles on at least one surface of said ion exchange membrane wherein at least one of said anode and cathode contacts said porous, non-catalytic layer of particles, the layer of particles having a higher overvoltage than the contacting electrode.
Claim 33
Dependent Claim
68 words
An electrolysis cell comprising an anode in an anode compartment and a cathode in a cathode compartment separated by an ion exchange membrane having a porous, non-catalytic layer of particles on at least one surface of said ion exchange membrane wherein at least one of said anode and cathode contacts said porous, non-catalytic layer of particles, the layer of particles having a higher overvoltage than the contacting electrode.
Claim 34
Dependent Claim
53 words
An electrolysis cell comprising an anode in an anode compartment and a cathode in a cathode compartment separated by an ion exchange membrane in contact with a porous non-electrode layer comprising a polytetrafluoroethylene and a non-catalytic, electrically non-conductive, inorganic particulate material dispersed through the porous layer wherein said cathode contacts said porous layer.
Claim 35
Dependent Claim
53 words
An electrolysis cell comprising an anode in an anode compartment and a cathode in a cathode compartment separated by an ion exchange membrane in contact with a porous non-electrode layer comprising a polytetrafluoroethylene and a non-catalytic, electrically non-conductive, inorganic particulate material dispersed through the porous layer wherein said cathode contacts said porous layer.
Claim 36
Dependent Claim
62 words
An electrolysis cell comprising an anode in an anode compartment and a cathode in a cathode compartment separated by an ion exchange membrane in contact with a porous matrix comprising polytetrafluoroethylene and a non-catalytic, electrically conductive, inorganic particulate material dispersed through the porous material wherein said cathode contacts said porous matrix and said inorganic material has a higher overvoltage than the cathode.
Claim 37
Dependent Claim
62 words
An electrolysis cell comprising an anode in an anode compartment and a cathode in a cathode compartment separated by an ion exchange membrane in contact with a porous matrix comprising polytetrafluoroethylene and a non-catalytic, electrically conductive, inorganic particulate material dispersed through the porous material wherein said cathode contacts said porous matrix and said inorganic material has a higher overvoltage than the cathode.
Claim 38
Dependent Claim
64 words
An electrolysis cell comprising an anode in an anode compartment and a cathode in a cathode compartment separated by an ion exchange membrane having a porous, particulate, non-electrode electroconductive, non-catalytic layer on the cathode surface of said ion exchange membrane wherein said cathode contacts said porous electroconductive non-catalytic layer and said porous, electroconductive, non-catalytic layer has a higher hydrogen overvoltage than the contacting cathode.
Claim 39
Dependent Claim
64 words
An electrolysis cell comprising an anode in an anode compartment and a cathode in a cathode compartment separated by an ion exchange membrane having a porous, particulate, non-electrode electroconductive, non-catalytic layer on the cathode surface of said ion exchange membrane wherein said cathode contacts said porous electroconductive non-catalytic layer and said porous, electroconductive, non-catalytic layer has a higher hydrogen overvoltage than the contacting cathode.
Claim 40
Dependent Claim
187 words
An electrolysis cell comprising: a platinum guaze anode in an anode compartment a nickel guaze cathode in a cathode compartment separated by a 250μ thick ion exchange membrane comprising a hydrolyzed copolymer of CF 2 ═CF 2 and CF 2 ═CFO(CF 2 ) 3 --COOCH 3 having an ion exchange capacity of 1.45 meq/g resin wherein at least one of the cathode or anode surfaces of said ion exchange membrane contains a porous non-electrode layer comprising particulate material, when said porous layer is adhered to the cathode surface of said ion exchange membrane said particulate material is selected from the group consisting of nickel oxide, and tin oxide and when said porous layer is adhered to the anode surface of said ion exchange membrane the particulate material is selected from the group consisting of tin oxide and titanium oxide wherein when said porous layer is on the cathode surface of the ion exchange membrane, the cathode is in contact with said porous layer and when said porous layer is on the anode side of the ion exchange membrane the anode is in contact with said porous layer.
Claim 41
Dependent Claim
187 words
An electrolysis cell comprising: a platinum guaze anode in an anode compartment a nickel guaze cathode in a cathode compartment separated by a 250μ thick ion exchange membrane comprising a hydrolyzed copolymer of CF 2 ═CF 2 and CF 2 ═CFO(CF 2 ) 3 --COOCH 3 having an ion exchange capacity of 1.45 meq/g resin wherein at least one of the cathode or anode surfaces of said ion exchange membrane contains a porous non-electrode layer comprising particulate material, when said porous layer is adhered to the cathode surface of said ion exchange membrane said particulate material is selected from the group consisting of nickel oxide, and tin oxide and when said porous layer is adhered to the anode surface of said ion exchange membrane the particulate material is selected from the group consisting of tin oxide and titanium oxide wherein when said porous layer is on the cathode surface of the ion exchange membrane, the cathode is in contact with said porous layer and when said porous layer is on the anode side of the ion exchange membrane the anode is in contact with said porous layer.
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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) | 1990-05-18 | 1990-11-17 | 1991-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-18 | 1994-11-17 | 1995-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-18 | 1998-11-17 | 1999-05-19 | $7700.00 | Window Closed / Lapsed |