US4142949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing an electrode for use in the electrolytic generation of hydrogen peroxide
Assignee: Forschungszentrum Jülich
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Filing: 1977-02-16
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Granted: 1979-03-06
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Expires: 1997-02-16
Abstract
Abstract An electrode especially adapted for the electrolytic production of hydrogen peroxide is made by heating activated carbon powder to a temperature above 900° C. and mixing it with a binder and a hydrophobic additive, an electrically conductive network being embedded in the mixture. According to the invention, the activated carbon is heated to incandescence in a hydrogen atmosphere.
Inventors
- 👤 Wolfgang Faul
- 👤 Bertel Kastening
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:41
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/28; C25B1/30; C25B11/00; C25B11/04; C25B11/042; C25B11/043
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
85 words
A process for making an electrode capable of cathodically generating hydrogen peroxide, which comprises the steps of: incandescently heating an active-carbon powder at a temperature above 900° C. in a hydrogen atmosphere for a period of at least 30 minutes thereby modifying the surface characteristics of the active-carbon powder; cooling the incandescently heated active-carbon powder in a hydrogen atmosphere; mixing the cooled active-carbon powder with a binder and a hydrophobic substance to form an active mass; and applying said active mass to a conductive support.
Claim 2
Dependent Claim
85 words
A process for making an electrode capable of cathodically generating hydrogen peroxide, which comprises the steps of: incandescently heating an active-carbon powder at a temperature above 900° C. in a hydrogen atmosphere for a period of at least 30 minutes thereby modifying the surface characteristics of the active-carbon powder; cooling the incandescently heated active-carbon powder in a hydrogen atmosphere; mixing the cooled active-carbon powder with a binder and a hydrophobic substance to form an active mass; and applying said active mass to a conductive support.
Claim 3
Dependent Claim
23 words
The process defined in claim 1 wherein hydrogen is passed through said active-carbon powder during the incandescent heating and during the cooling thereof.
Claim 4
Dependent Claim
22 words
The process defined in claim 2 wherein said active-carbon powder is incandescently heated at a temperature between 1000° C. and 1250° C.
Claim 5
Dependent Claim
34 words
The process defined in claim 3 wherein said active-carbon powder is incandescently heated in a vessel, the hydrogen atmosphere in said vessel being changed 2 to 7 times per hour during the incandescent heating.
Claim 6
Dependent Claim
21 words
The process defined in claim 2 wherein said active-carbon powder is incandescently heated for a period of 1 to 2 hours.
Claim 7
Dependent Claim
19 words
The process defined in claim 1 wherein said active-carbon powder has a particle size of less than 40 microns.
Claim 8
Dependent Claim
30 words
A method of producing hydrogen peroxide which comprises electrolyzing an aqueous electrolyte with the electrode produced as defined in claim 1 as a cathode while supplying oxygen to said mass.
Claim 9
Dependent Claim
14 words
An electrode for the generation of hydrogen peroxide produced as defined in claim 1.
Claim 10
Dependent Claim
29 words
The electrode as defined in claim 8 which comprises a housing formed with an opening, said active mass upon said support spanning said opening and forming a diaphragm thereacross.
Claim 11
Dependent Claim
17 words
The process defined in claim 1 wherein said mixture is formed in a solvent for said binder.
References Cited (Backward Citations)
US1646389A
Cited
US1722055A
Cited
US3111396A
Cited
US3856574A
Cited
US3856640A
Cited
US3968273A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-05 | 1982-09-04 | 1983-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-05 | 1986-09-04 | 1987-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-05 | 1990-09-04 | 1991-03-06 | $7700.00 | Window Closed / Lapsed |