US4121992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic cell
Assignee: Dow Chemical Co
•
Filing: 1977-10-11
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Granted: 1978-10-24
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Expires: 1997-10-11
Abstract
Abstract The invention relates to an improvement in an electrolytic cell having an anode positioned within an anode chamber and an oxidizing gas depolarized cathode positioned within a cathode chamber adapted to contain a catholyte, said cathode chamber spaced apart from the anode chamber by a cation-permeable partition. The improved cell comprises the cathode having a cellular metal structure comprising a continuous interconnected network of electrolytically deposited metal defining therebetween a plurality of substantially convex and substantially electrically nonconductive cellular compartments. The arrangement of the compartments is adapted to permit passage of the oxidizing gas to the catholyte. The cellular metal structure is further characterized in that the deposited metal interfaces the cellular compartments within the cellular metal structure.
Inventors
- 👤 Frank E. Towsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:25
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/34; C25B1/46; C25B11/00; C25B11/02; C25B11/03; C25D; C25D1/00; C25D1/08
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
105 words
In an electrolytic cell having an anode positioned within an anode chamber and an oxidizing gas depolarized cathode positioned within a cathode chamber adapted to contain a catholyte, said cathode chamber spaced apart from the anode chamber by a cation-permeable partition, the improved cell comprising the cathode having a cellular metal structure comprising a continuous interconnected network of electrolytically deposited metal defining therebetween a plurality of substantially convex and substantially electrically nonconductive cellular compartments adapted to permit passage of the oxidizing gas to the catholyte, said cellular metal structure further characterized in that the deposited metal interfaces the cellular compartments within the cellular metal structure.
Claim 2
Dependent Claim
105 words
In an electrolytic cell having an anode positioned within an anode chamber and an oxidizing gas depolarized cathode positioned within a cathode chamber adapted to contain a catholyte, said cathode chamber spaced apart from the anode chamber by a cation-permeable partition, the improved cell comprising the cathode having a cellular metal structure comprising a continuous interconnected network of electrolytically deposited metal defining therebetween a plurality of substantially convex and substantially electrically nonconductive cellular compartments adapted to permit passage of the oxidizing gas to the catholyte, said cellular metal structure further characterized in that the deposited metal interfaces the cellular compartments within the cellular metal structure.
Claim 3
Dependent Claim
29 words
The improved cell of claim 1 wherein the electrolytically deposited metal is selected from the group consisting of copper, silver, palladium, platinum, nickel, gold, rhodium, indium and alloys thereof.
Claim 4
Dependent Claim
13 words
The improved cell of claim 1 wherein the electrolytically deposited metal is silver.
Claim 5
Dependent Claim
13 words
The improved cell of claim 1 wherein the electrolytically deposited metal is palladium.
Claim 6
Dependent Claim
13 words
The improved cell of claim 1 wherein the electrolytically deposited metal is platinum.
Claim 7
Dependent Claim
25 words
The improved cell of claim 1 wherein the electrolytically deposited metal defines a plurality of substantially convex cellular compartments arranged in an open cellular array.
Claim 8
Dependent Claim
32 words
The improved cell of claim 1 wherein at least a portion of the convex cellular compartments are at least partially filled with catholyte and at least partially filled with a gaseous medium.
Claim 9
Dependent Claim
12 words
The improved cell of claim 7 wherein the gas contains molecular oxygen.
Claim 10
Dependent Claim
26 words
The improved cell of claim 1 wherein the electrically deposited metal occupies from about 1 to about 50 percent by volume of the cellular metal structure.
Claim 11
Dependent Claim
26 words
The improved cell of claim 1 wherein the electrically deposited metal occupies from about 3 to about 40 percent by volume of the cellular metal structure.
Claim 12
Dependent Claim
21 words
The improved cell of claim 1 wherein the cellular compartments have a diameter of from about 0.1 to about 300 microns.
Claim 13
Dependent Claim
21 words
The improved cell of claim 1 wherein the cellular compartments have a diameter of from about 1 to about 50 microns.
Claim 14
Dependent Claim
13 words
The improved cell of claim 1 wherein the cation-permeable partition is a diaphragm.
Claim 15
Dependent Claim
11 words
The improved cell of claim 13 wherein the diaphragm is asbestos.
Claim 16
Dependent Claim
15 words
The improved cell of claim 1 wherein the cation-permeable partition is an ion exchange membrane.
Claim 17
Dependent Claim
14 words
The improved cell of claim 1 wherein the cell is adapted to produce chlorine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-23 | 1982-04-24 | 1982-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-23 | 1986-04-24 | 1986-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-23 | 1990-04-24 | 1990-10-24 | $7700.00 | Window Closed / Lapsed |