US4313813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fixed bed oxygen depolarized cathode chlor-alkali cell
Assignee: PPG Industries Inc
•
Filing: 1980-06-26
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Granted: 1982-02-02
•
Expires: 2000-06-26
Abstract
Abstract Disclosed is a method of electrolyzing alkali metal chloride brine between an anode and a cathode, with oxidant feed to the cathode, where the cathode is a bed of porous particles having HO2- disproportionation catalyst. Also disclosed is an electrolytic cell for carrying out the disclosed process.
Inventors
- 👤 Harlan B. Johnson
- 👤 Ronald D. Chamberlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:16
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/34; C25B1/46; C25B11/00; C25B11/04; C25B11/042; C25B9/00; C25B9/40; C25B9/47
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
94 words
In an electrolytic cell having (a) an anolyte compartment fabricated of a material resistant to concentrated, chlorinated, alkali metal chloride brines; (b) an anode in said anolyte compartment; (c) a catholyte compartment fabricated of a material resistant to concentrated, alkali metal hydroxide solutions; (d) cathode means comprising porous particles having areas of HO 2 - disproportionation catalyst; (e) means for feeding an oxidant to said catholyte compartment; and (f) an ion permeable barrier interposed between said anode and said cathode means; the improvement wherein said HO 2 - disproportionation catalyst is LaCoO 3 .
Claim 2
Dependent Claim
94 words
In an electrolytic cell having (a) an anolyte compartment fabricated of a material resistant to concentrated, chlorinated, alkali metal chloride brines; (b) an anode in said anolyte compartment; (c) a catholyte compartment fabricated of a material resistant to concentrated, alkali metal hydroxide solutions; (d) cathode means comprising porous particles having areas of HO 2 - disproportionation catalyst; (e) means for feeding an oxidant to said catholyte compartment; and (f) an ion permeable barrier interposed between said anode and said cathode means; the improvement wherein said HO 2 - disproportionation catalyst is LaCoO 3 .
Claim 3
Dependent Claim
19 words
The electrolytic cell of claim 1 wherein the porous particles comprise a porous, carbonaceous substrate having LaCoO 3 thereon.
Claim 4
Dependent Claim
27 words
The electrolytic cell of claim 2 wherein the carbonaceous substrate is activated carbon having a surface area of about 100 to about 500 square meters per gram.
Claim 5
Dependent Claim
15 words
The electrolytic cell of claim 2 wherein said porous carbonaceous particles comprise a hydrophobic material.
Claim 6
Dependent Claim
14 words
The electrolytic cell of claim 4 wherein said porous hydrophobic material is a polyfluorocarbon.
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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) | 1985-02-01 | 1985-08-03 | 1986-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-01 | 1989-08-03 | 1990-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-01 | 1993-08-03 | 1994-02-02 | $7700.00 | Window Closed / Lapsed |