US4112149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Converting a diaphragm electrolytic cell to a membrane electrolytic cell
Assignee: Diamond Shamrock Corp
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Filing: 1977-04-25
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Granted: 1978-09-05
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Expires: 1997-04-25
Abstract
Abstract Disclosed is a method for converting a diaphragm electrolytic cell to a membrane electrolytic cell by using the standard diaphragm cell equipment and applying a membrane over top of a matting material upon the cathode surface. This method permits a manufacturer having diaphragm electrolytic cells to convert those cells to membrane electrolytic cells without significant capital expenditure to achieve the desirable characteristics of a membrane electrolytic cell.
Inventors
- 👤 Andrew D. Babinsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:45
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2218; C08J5/2231; C08J5/2237; C25; C25B; C25B13/00; C25B13/04; C25B13/05; C25B13/06; C25B13/08; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
121 words
A method for forming a membrane over a standard diaphragm cell foraminous electrode comprising the steps of: suspending a matting material in a fluid medium; inserting a foraminous electrode into the suspension; vacuum forming a layer of the suspended matting material over the surface of the foraminous electrode so as to substantially reduce the porosity of the foraminous electrode materials; applying to the surface of the foraminous electrode with the matting material thereon, a layer of thermoplastic material including material containing carboxyl ion exchange groups and baking the foraminous electrode with the layers in place until the thermoplastic material is fused into a thin and uniform film on the surface of the matting material which is substantially impermeable to hydraulic flow.
Claim 2
Independent Claim
121 words
A method for forming a membrane over a standard diaphragm cell foraminous electrode comprising the steps of: suspending a matting material in a fluid medium; inserting a foraminous electrode into the suspension; vacuum forming a layer of the suspended matting material over the surface of the foraminous electrode so as to substantially reduce the porosity of the foraminous electrode materials; applying to the surface of the foraminous electrode with the matting material thereon, a layer of thermoplastic material including material containing carboxyl ion exchange groups and baking the foraminous electrode with the layers in place until the thermoplastic material is fused into a thin and uniform film on the surface of the matting material which is substantially impermeable to hydraulic flow.
Claim 3
Dependent Claim
25 words
A method according to claim 1 wherein the thermoplastic material is applied by vacuum forming a slurry of thermoplastic material from a FREON 113 solvent.
Claim 4
Dependent Claim
15 words
A method according to claim 1 wherein the thermoplastic material is applied by plasma spray.
Claim 5
Dependent Claim
23 words
A method according to claim 1 wherein said baking step is done at a temperature within the range of 240° to 300° C.
Claim 6
Dependent Claim
19 words
A method according to claim 1 wherein the matting material is selected from the group of: asbestos or cellulose.
References Cited (Backward Citations)
GB1410313A
Cited
US3980613A
Cited
US3969285A
Cited
US3928166A
Cited
US3923630A
Cited
US3944477A
Cited
US4036728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |