US4401544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite electrodes for diaphragmless electrolytic cells for the production of chlorates and hypochlorites II
Assignee: Aker Solutions Canada Inc
•
Filing: 1981-06-01
•
Granted: 1983-08-30
•
Expires: 2001-06-01
Abstract
Abstract A composite electrode made up by stacking a multiplicity of alternate anode plates and cathode plates the adjacent surfaces of which are insulated from each other by a thin film of an insulating material such as fluon, kynar, PVC, etc. With this composite electrode, a K value of 0.100 to 0.150 can be easily achieved in the electrolytic production of chlorates and hypochlorites.
Inventors
- 👤 Kin Seto
- 👤 Ian H. Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:06
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/02; C25B9/00; C25B9/13; C25B9/17
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
154 words
An electrode assembly for use in diaphragmless electrolyte cells for the production of alkali metal chlorates and hypochlorites comprising: (a) first and second base plates disposed in parallel relationship at a distance from each other; (b) at least one row of equidistantly spaced apart finger-like metal cathodes projecting from the first base plate in the direction of but short of the distance to the second base plate, the cathodes in each row being in a same plane essentilly perpendicular to the base plates; and (c) for each row of finger-like metal cathodes, a corresponding coplanar row of finger-like metal anodes projecting from the second base plate in the direction of but short of the distance to the first base plate; characterized in that the anodes and cathodes of corresponding coplanar rows of anodes and cathodes are interdigitated and are insulated from each other by a corresponding coplanar thin layer of non-electrically conductive insulating material.
Claim 2
Dependent Claim
154 words
An electrode assembly for use in diaphragmless electrolyte cells for the production of alkali metal chlorates and hypochlorites comprising: (a) first and second base plates disposed in parallel relationship at a distance from each other; (b) at least one row of equidistantly spaced apart finger-like metal cathodes projecting from the first base plate in the direction of but short of the distance to the second base plate, the cathodes in each row being in a same plane essentilly perpendicular to the base plates; and (c) for each row of finger-like metal cathodes, a corresponding coplanar row of finger-like metal anodes projecting from the second base plate in the direction of but short of the distance to the first base plate; characterized in that the anodes and cathodes of corresponding coplanar rows of anodes and cathodes are interdigitated and are insulated from each other by a corresponding coplanar thin layer of non-electrically conductive insulating material.
Claim 3
Dependent Claim
28 words
An electrode assembly as claimed in claim 1 wherein the insulating material is selected from the group consisting of ceramics, silicone rubber and non-electrically conductive plastic polymeric materials.
Claim 4
Dependent Claim
21 words
An electrode assembly as claimed in claim 2 wherein the plastic polymeric material is polytetrafluoroethylene, polychlorotrifluoroethylene, polyvinyl chloride or polyvinylidene fluoride.
Claim 5
Dependent Claim
44 words
An electrode assembly as claimed in claim 1, 2 or 3 wherein the cathodes are made of stainless steel or carbon steel and the anodes are made of titanium or zirconium coated with a noble metal of the platinum group or an oxide thereof.
Claim 6
Dependent Claim
31 words
An electrode assembly as claimed in claim 1, 2 or 3 wherein the first and second base plates are made of the same metal as that of the electrodes projecting therefrom.
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) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |