US4250013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of depositing a catalyst to form a solid polymer electrolyte membrane
Assignee: PPG Industries Inc
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Filing: 1979-02-23
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Granted: 1981-02-10
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Expires: 1999-02-23
Abstract
Abstract Disclosed is a method of operating a solid polymer electrolyte chlor-alkali cell by imposing a pulsative current, e.g., pulsed direct current, half wave alternating current, or rectified alternating current, across the cell. Also disclosed is the chemical deposition of porous catalysts on a permionic membrane whereby to obtain a solid polymer electrolyte.
Inventors
- 👤 William W. Carlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:16
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/34; C25B1/46; C25B9/00; C25B9/05; C25B9/13; C25B9/15; C25B9/17; C25B9/19; C25B9/23; C25B9/70; C25B9/73; C25B9/75; C25B9/77
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
87 words
A method of depositing a catalyst to form a solid polymer electrolyte comprising contacting a permionic membrane with a first solution comprising a reducing agent chosen from the group consisting of hypophosphites and borohydrides, and thereafter contacting the permionic membrane with a second solution comprising salts of metals more and less leachable to be deposited on the permionic membrane, a complexing agent, and a buffer; codepositing a more leachable and a less leachable transition metal on the permionic membrane and leaching out the more leachable transition metal.
Claim 2
Independent Claim
87 words
A method of depositing a catalyst to form a solid polymer electrolyte comprising contacting a permionic membrane with a first solution comprising a reducing agent chosen from the group consisting of hypophosphites and borohydrides, and thereafter contacting the permionic membrane with a second solution comprising salts of metals more and less leachable to be deposited on the permionic membrane, a complexing agent, and a buffer; codepositing a more leachable and a less leachable transition metal on the permionic membrane and leaching out the more leachable transition metal.
Claim 3
Dependent Claim
14 words
The method of claim 4 wherein the transition metals are Group VIII transition metals.
Claim 4
Dependent Claim
22 words
The method of claim 2 wherein the transition metals are chosen from the group consisting of nickel and the platinum group metals.
Claim 5
Dependent Claim
23 words
The method of claim 2 wherein the transition metals comprise iron and a second Group VIII transition metal and leaching out the iron.
References Cited (Backward Citations)
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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) | 1984-02-10 | 1984-08-11 | 1985-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $7700.00 | Window Closed / Lapsed |