US4070257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic process using novel diaphragm
Assignee: Electrode Corp
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Filing: 1976-01-29
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Granted: 1978-01-24
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Expires: 1996-01-29
Abstract
Abstract An electrolytic process employing a diaphragm of a size of at least 1 cm in length in at least two directions, the diaphragm comprising a diaphragm base composed of fibers of fibrous structure containing inorganic fibers and a binder containing a fluorine-containing resin, the fluorine-containing resin being present in an amount of 0.5 - 60% by weight based on the weight of the diaphragm.
Inventors
- 👤 Kensuke Motani
- 👤 Shunji Matuura
- 👤 Ryohei Kataoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:44
CPC Classifications
B; B01; B01D; B01D69/00; B01D69/02; B01D39/00; B01D39/14; B01D39/20; B01D39/2003; B01D39/2017; B01D39/2024; B01D39/2027; B01D39/2041; B01D39/2048; B01D39/2055; B01D39/2065; B01D39/2068; B01D39/2082; B01D39/2089; B01D69/14; B01D69/141; B01D69/148; C; C25; C25B; C25B13/00; C25B13/04; C25B13/05; C25B13/06; B01D2239/00; B01D2239/06; B01D2239/0604; B01D2239/064; B01D2239/08; B01D2239/086; B01D2239/12; B01D2239/1258; B01D71/00; B01D71/06; B01D71/30; B01D71/32
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
137 words
In an electrolysis process for brine wherein a diaphragm is utilized in an electrolytic cell, the improvement wherein said diphragm is of a size of at least 1 cm in length in at least two directions, said diaphragm having permeability to water of 0.003 - 0.32 ml/cm 2 /hr/cm.H 2 O and comprising a diaphragm base composed of inorganic fibers selected from the group consisting of asbestos and graphite fibers and a fluorine-containing resin, said fluorine-containing resin being present in an amount of 0.5 - 60% by weight based on the weight of said diaphragm, and said diaphragm being prepared by homogeneously blending a dispersion of said inorganic fibers with said fluorine-containing resin, forming said blend into a film, and then heat treating said film so that said resin is locally sintered and adhered to the film.
Claim 2
Dependent Claim
137 words
In an electrolysis process for brine wherein a diaphragm is utilized in an electrolytic cell, the improvement wherein said diphragm is of a size of at least 1 cm in length in at least two directions, said diaphragm having permeability to water of 0.003 - 0.32 ml/cm 2 /hr/cm.H 2 O and comprising a diaphragm base composed of inorganic fibers selected from the group consisting of asbestos and graphite fibers and a fluorine-containing resin, said fluorine-containing resin being present in an amount of 0.5 - 60% by weight based on the weight of said diaphragm, and said diaphragm being prepared by homogeneously blending a dispersion of said inorganic fibers with said fluorine-containing resin, forming said blend into a film, and then heat treating said film so that said resin is locally sintered and adhered to the film.
Claim 3
Dependent Claim
27 words
The process of claim 1 wherein said fluorine-containing resin is at least one member of the group consisting of polytetrafluoroethylene, poly(tetrafluoroethylene-hexafluoropropylene), polychlorotrifluoroethylene, polyvinylidene fluoride and polyvinyl fluoride.
Claim 4
Dependent Claim
27 words
The process of claim 1 wherein said fluorine-containing resin is present in an amount of 5 - 50% by weight based on the weight of said diaphragm.
References Cited (Backward Citations)
US3694281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-23 | 1981-07-25 | 1982-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-23 | 1985-07-25 | 1986-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-23 | 1989-07-25 | 1990-01-24 | $7700.00 | Window Closed / Lapsed |