US3928166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dimensionally adjustable anode-dimensionally stable diaphragm combination for electrolytic cells
Assignee: Diamond Shamrock Chemicals Co
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Filing: 1974-03-01
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Granted: 1975-12-23
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Expires: 1994-03-01
Abstract
Abstract A diaphragm cell for the electrolytic production of chlorine and alkali metal hydroxide, in other respects conventional, is improved by the provision of a dimensionally stable, polymermodified diaphragm together with a dimensionally adjustable anode capable of movement toward said diaphragm on cell assembly.
Inventors
- 👤 Kevin J O'leary
- 👤 Charles P Tomba
- 👤 Iii Robert W Fenn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:11
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/02; C25B13/00; C25B13/04; C25B13/05; C25B13/06; C25B13/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
86 words
AN IMPROVEMENT IN A CELL FOR THE ELECTROLYSIS OF AQUEOUS ALKALI METAL CHOLRIDE SOLUTIONS COMPRISING A CONTAINER DIVIDED INTO ANODE-CONTAINING AND CATHODE-CONTAINING COMPARTMENTS BY A HYDRAULICALLY PERMEABLE DIAPHRAGM, WHICH IMPROVEMENT COMPRISES, IN COMBINATION: A. AS SAID ANODE, A DIMENSIONALLY ADJUSTABLE ELECTRODE COMPRISING AN ANODE-WORKING FACE, AN ANODE RISER, AND A MOVABLE MEANS FOR CONNECTING THE ANODE WORKING FACE AND ANODE RISER WITH ELECTRICAL INTEGRITY, AND B. AS SAID DIAPHRAGM, A DIMENSIONALLY STABLE, HEAT-FUSED, POLYFLUOROCARBON-ASBESTOS DIAPHRAGM, SAID DIAPHRAGM HAVING A DISCONTINUOUS POLYFLUOROCARBON COATING BINDING THE ASBESTOS TOGETHER.
Claim 2
Dependent Claim
86 words
AN IMPROVEMENT IN A CELL FOR THE ELECTROLYSIS OF AQUEOUS ALKALI METAL CHOLRIDE SOLUTIONS COMPRISING A CONTAINER DIVIDED INTO ANODE-CONTAINING AND CATHODE-CONTAINING COMPARTMENTS BY A HYDRAULICALLY PERMEABLE DIAPHRAGM, WHICH IMPROVEMENT COMPRISES, IN COMBINATION: A. AS SAID ANODE, A DIMENSIONALLY ADJUSTABLE ELECTRODE COMPRISING AN ANODE-WORKING FACE, AN ANODE RISER, AND A MOVABLE MEANS FOR CONNECTING THE ANODE WORKING FACE AND ANODE RISER WITH ELECTRICAL INTEGRITY, AND B. AS SAID DIAPHRAGM, A DIMENSIONALLY STABLE, HEAT-FUSED, POLYFLUOROCARBON-ASBESTOS DIAPHRAGM, SAID DIAPHRAGM HAVING A DISCONTINUOUS POLYFLUOROCARBON COATING BINDING THE ASBESTOS TOGETHER.
Claim 3
Dependent Claim
11 words
A cell as in claim 1 wherein said polyfluorocarbon is polytetrafluoroethylene.
Claim 4
Dependent Claim
103 words
An improvement in a cell for the electrolysis of aqueous alkali metal chloride solutions comprising a container divided into anode-containing and cathode-containing compartments by a hydraulically permeable diaphragm, which improvement comprises, in combination: a. as said anode, a dimensionally adjustable electrode comprising an anode-working face, an anode riser, and a moveable means for connecting the anode working face and anode riser with electrical integrity, and b. as said diaphragm, a dimensionally stable, heat-fused, polymer-asbestos diaphragm, said polymer being selected from the group consisting of poly(vinylfluoride), poly(vinylidene fluoride), polytetrafluoroethylene, polyperfluoroethylene propylene, and polychlorotrifluoroethylene-polyethylene, said diaphragm having a discontinuous polymer coating binding the asbestos together.
Claim 5
Dependent Claim
103 words
An improvement in a cell for the electrolysis of aqueous alkali metal chloride solutions comprising a container divided into anode-containing and cathode-containing compartments by a hydraulically permeable diaphragm, which improvement comprises, in combination: a. as said anode, a dimensionally adjustable electrode comprising an anode-working face, an anode riser, and a moveable means for connecting the anode working face and anode riser with electrical integrity, and b. as said diaphragm, a dimensionally stable, heat-fused, polymer-asbestos diaphragm, said polymer being selected from the group consisting of poly(vinylfluoride), poly(vinylidene fluoride), polytetrafluoroethylene, polyperfluoroethylene propylene, and polychlorotrifluoroethylene-polyethylene, said diaphragm having a discontinuous polymer coating binding the asbestos together.
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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |