US3901774A
Expired / Lapsed
US
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Method of electrolyzing alkali metal halide solution and apparatus therefor
Assignee: Tokuyama Corp
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Filing: 1974-04-05
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Granted: 1975-08-26
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Expires: 1994-04-05
Abstract
Abstract A method for electrolyzing an alkali metal halide solution using a horizontal diaphragm electrolytic cell, wherein a diaphragm having a water-permeability of not more than 0.02 ml/cm2.cm H2O.hr is used, and water or an electrolytic solution is supplied to the underside of the diaphragm during electrolysis.
Inventors
- 👤 Kensuke Motani
- 👤 Kinichi Yabuki
- 👤 Shunji Matsuura
- 👤 Sunao Tomoguchi
- 👤 Yasuo Murata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:06
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/34; C25B1/46
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
46 words
A METHOD FOR ELECTROLYZING AN ALKALI METAL HALIDE SOLUTION USING A HORIZONTAL DIAPHRAGM ELECTROLYTIC CELL, WHEREIN A DIAPHRAGM HAVING A WATER-PERMEABILITY OF NOT MORE THAN 0.02 MI/CM2.CM H2O.HR IS USED, AND WATER OR AN ELECTROLYTIC SOLUTION IS SUPPLIED TO THE UNDERSIDE OF THE DIAPHRAGM DURING ELECTROLYSIS.
Claim 2
Independent Claim
46 words
A METHOD FOR ELECTROLYZING AN ALKALI METAL HALIDE SOLUTION USING A HORIZONTAL DIAPHRAGM ELECTROLYTIC CELL, WHEREIN A DIAPHRAGM HAVING A WATER-PERMEABILITY OF NOT MORE THAN 0.02 MI/CM2.CM H2O.HR IS USED, AND WATER OR AN ELECTROLYTIC SOLUTION IS SUPPLIED TO THE UNDERSIDE OF THE DIAPHRAGM DURING ELECTROLYSIS.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein said diaphragm is a cation exchange membrane.
Claim 4
Dependent Claim
17 words
The method of claim 1 wherein the supply of water or an electrolytic solution is performed continuously.
Claim 5
Dependent Claim
25 words
The method of claim 1 wherein said water or electrolytic solution is supplied when the voltage of the electrolytic cell exceeds a predetermined standard voltage.
Claim 6
Dependent Claim
13 words
The method of claim 1 wherein said electrolytic solution is a catholyte solution.
Claim 7
Dependent Claim
17 words
The method of claim 1 wherein the supply of water or an electrolytic solution is performed intermittently.
Claim 8
Independent Claim
78 words
A method for electrolyzing an alkali metal halide solution using a horizontal electrolytic cell, wherein a cation exchange membrane having a water-permeability of not more than 0.02 ml/cm2.cm H2O.hr is used as a diaphragm, a wire gauze or porous plate having a porosity of at least 50 % is used as a cathode, and water or an alkali hydroxide solution is supplied to the undersides of the cathode in the form of atomized spray or jet during electrolysis,
Claim 9
Independent Claim
78 words
A method for electrolyzing an alkali metal halide solution using a horizontal electrolytic cell, wherein a cation exchange membrane having a water-permeability of not more than 0.02 ml/cm2.cm H2O.hr is used as a diaphragm, a wire gauze or porous plate having a porosity of at least 50 % is used as a cathode, and water or an alkali hydroxide solution is supplied to the undersides of the cathode in the form of atomized spray or jet during electrolysis,
Claim 10
Independent Claim
69 words
A method for electrolyzing an alkali metal halide solution using a horizontal electrolytic cell, wherein a cation exchange membrane having a water-permeability of not more than 0.02 ml/cm2.cm H2O.hr is used as a diaphragm, a liquid maintaining material is disposed in contact with the underside of the cation exchange membrane and the cathode surface, and water or an electrolytic solution is supplied to the liquid maintaining material during electrolysis.
Claim 11
Independent Claim
69 words
A method for electrolyzing an alkali metal halide solution using a horizontal electrolytic cell, wherein a cation exchange membrane having a water-permeability of not more than 0.02 ml/cm2.cm H2O.hr is used as a diaphragm, a liquid maintaining material is disposed in contact with the underside of the cation exchange membrane and the cathode surface, and water or an electrolytic solution is supplied to the liquid maintaining material during electrolysis.
Claim 12
Dependent Claim
29 words
A horizontal diaphragm electrolytic cell including a diaphragm having a water-permeability of not more than 0.02 ml/cm2.cm.H2O.Hr and means for supplying a liquid to the underside of the diaphragm.
Claim 13
Dependent Claim
29 words
A horizontal diaphragm electrolytic cell including a diaphragm having a water-permeability of not more than 0.02 ml/cm2.cm.H2O.Hr and means for supplying a liquid to the underside of the diaphragm.
Claim 14
Dependent Claim
16 words
The electrolytic cell of claim 9 wherein said means for supplying the liquid is a sprayer.
Claim 15
Dependent Claim
16 words
The electrolytic cell of claim 9 wherein said means for supplying the liquid is a siphon.
Claim 16
Dependent Claim
17 words
The electrolytic cell of claim 9 wherein said means for supplying the liquid is a rotating blade.
Claim 17
Dependent Claim
16 words
The electrolytic cell of claim 9 wherein said means for supplying the liquid is a sprinkler.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |