Patent US4339314A successfully refreshed from Google Patents.
US4339314A
Expired / Lapsed
US
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Solid polymer electrolyte and method of electrolyzing brine
Assignee: PPG Industries Inc
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Filing: 1981-02-17
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Granted: 1982-07-13
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Expires: 2001-02-17
Abstract
Abstract Disclosed is a solid polymer electrolyte electrolytic cell having a fluorinated carboxylic acid permionic membrane with anodic catalyst embedded in a hydrophobic film on the permionic membrane. The anodic catalyst may be particulate. Also disclosed is a solid polymer electrolyte electrolytic cell having a transition metal boride cathode catalyst. Additionally, there is disclosed a solid polymer electrolyte electrolytic cell having resilient, removable current collector means.
Inventors
- 👤 Howard H. Hoekje
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:01
CPC Classifications
C; C25; C25B; C25B9/00; C25B9/17; C25B9/19; C25B9/23; C25B1/00; C25B1/01; C25B1/34; C25B1/46; C25B11/00; C25B11/04; C25B11/042; C25B11/046; C25B11/047; C25B11/048; C25B11/051; C25B11/073; C25B11/091; C25B11/095; C25B9/05; C25B9/13; C25B9/60; C25B9/65; C25B9/70; C25B9/73; C25B9/75; C25B9/77
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
78 words
In a method of electrolyzing brine in an electrolytic cell having a permionic membrane with cathodic electrocatalyst bearing upon one surface of the permionic membrane, which method comprises feeding alkali metal chloride to the cell, imposing an electrical potential across the cell, and evolving hydrogen at the cathode electrocatalyst, the improvement wherein the cathodic electrocatalyst comprises particles consisting essentially of borides of transition metals chosen from the group consisting of borides of titanium, vanadium, niobium, tantalum, and tungsten.
Claim 2
Dependent Claim
78 words
In a method of electrolyzing brine in an electrolytic cell having a permionic membrane with cathodic electrocatalyst bearing upon one surface of the permionic membrane, which method comprises feeding alkali metal chloride to the cell, imposing an electrical potential across the cell, and evolving hydrogen at the cathode electrocatalyst, the improvement wherein the cathodic electrocatalyst comprises particles consisting essentially of borides of transition metals chosen from the group consisting of borides of titanium, vanadium, niobium, tantalum, and tungsten.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein the boride is TiB 2 .
Claim 4
Dependent Claim
61 words
In a method of electrolyzing brine in an electrolytic cell having a permionic membrane with cathodic electrocatalyst bonded to and embedded in one surface of the permionic membrane, which method comprises feeding alkali metal chloride to the cell, and imposing an electrical potential across the cell, the improvement wherein the cathodic electrocatalyst comprises particles consisting essentially of borides of transition metals.
Claim 5
Dependent Claim
61 words
In a method of electrolyzing brine in an electrolytic cell having a permionic membrane with cathodic electrocatalyst bonded to and embedded in one surface of the permionic membrane, which method comprises feeding alkali metal chloride to the cell, and imposing an electrical potential across the cell, the improvement wherein the cathodic electrocatalyst comprises particles consisting essentially of borides of transition metals.
Claim 6
Dependent Claim
24 words
The method of claim 3 wherein the borides are chosen from the group consisting of borides of titanium, vanadium, niobium, tantalum, chromium, and tungsten.
Claim 7
Dependent Claim
12 words
The method of claim 4 wherein the boride is TiB 2 .
Claim 8
Dependent Claim
45 words
In an electrolytic cell having a permionic membrane with a cathode bearing upon the cathodic surface thereof, the improvement wherein the cathode comprises particles consisting essentially of borides of transition metals chosen from the group consisting of borides of titanium, vanadium, niobium, tantalum, and tungsten.
Claim 9
Dependent Claim
45 words
In an electrolytic cell having a permionic membrane with a cathode bearing upon the cathodic surface thereof, the improvement wherein the cathode comprises particles consisting essentially of borides of transition metals chosen from the group consisting of borides of titanium, vanadium, niobium, tantalum, and tungsten.
Claim 10
Dependent Claim
13 words
The electrolytic cell of claim 6 wherein the boride is TiB 2 .
Claim 11
Dependent Claim
33 words
In an electrolytic cell having a permionic membrane with a cathode bearing upon the cathodic surface thereof, the improvement wherein the cathode comprises particles consisting essentially of a boride of a transition metal.
Claim 12
Dependent Claim
33 words
In an electrolytic cell having a permionic membrane with a cathode bearing upon the cathodic surface thereof, the improvement wherein the cathode comprises particles consisting essentially of a boride of a transition metal.
Claim 13
Dependent Claim
25 words
The electrolytic cell of claim 8 wherein the boride is chosen from the group consisting of borides of titanium, vanadium, niobium, tantalum, chromium, and tungsten.
Claim 14
Dependent Claim
13 words
The electrolytic cell of claim 9 wherein the boride is TiB 2 .
Claim 15
Dependent Claim
60 words
In a method of electrolyzing brine in an electrolytic cell having a permionic membrane with cathodic electrocatalyst bearing upon one surface of the permionic membrane, which method comprises feeding alkali metal chloride to the cell, and imposing an electrical potential across the cell, the improvement wherein the cathodic electrocatalyst comprises particles consisting essentially of a boride of a transition metal.
Claim 16
Dependent Claim
60 words
In a method of electrolyzing brine in an electrolytic cell having a permionic membrane with cathodic electrocatalyst bearing upon one surface of the permionic membrane, which method comprises feeding alkali metal chloride to the cell, and imposing an electrical potential across the cell, the improvement wherein the cathodic electrocatalyst comprises particles consisting essentially of a boride of a transition metal.
Claim 17
Dependent Claim
24 words
The method of claim 11 wherein the boride is chosen from the group consisting of borides of titanium, vanadium, niobium, tantalum, chromium, and tungsten.
Claim 18
Dependent Claim
12 words
The method of claim 12 wherein the boride is TiB 2 .
Claim 19
Dependent Claim
34 words
In an electrolytic cell having a permionic membrane with a cathode bonded to and embedded in the cathodic surface thereof, the improvement wherein the cathode comprises particles consisting essentially of borides of transition metals.
Claim 20
Dependent Claim
34 words
In an electrolytic cell having a permionic membrane with a cathode bonded to and embedded in the cathodic surface thereof, the improvement wherein the cathode comprises particles consisting essentially of borides of transition metals.
Claim 21
Dependent Claim
25 words
The electrolytic cell of claim 14 wherein the borides are chosen from the group consisting of borides of titanium, vanadium, niobium, tantalum, chromium, and tungsten.
Claim 22
Dependent Claim
13 words
The electrolytic cell of claim 15 wherein the boride is TiB 2 .
References Cited (Backward Citations)
US3770613A
Cited
US4191618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-12 | 1986-01-11 | 1986-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-12 | 1990-01-11 | 1990-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-12 | 1994-01-11 | 1994-07-13 | $7700.00 | Window Closed / Lapsed |