US4061554A
Expired / Lapsed
US
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Electrochemical method for producing oxygen
Assignee: GENERALE DE CONSTRUCTIONS ELECTRIQUES ET MECANIQUES "ALSTHOM ET CIE" Ste
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Filing: 1976-04-14
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Granted: 1977-12-06
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Expires: 1996-04-14
Abstract
Abstract Method for preparing very pure oxygen, consisting in making air in a basic medium react with the reduced form of a compound so as to form a peroxide which is capable of decomposing spontaneously into hydrogen peroxide and into the oxidized form of the said compound, and electrochemically oxidizing said hydrogen peroxide to evolve oxygen, and reducing the said oxidized form to regenerate the reduced form of the said compound. The invention is implemented in the chemical industry.
Inventors
- 👤 Nicole Chillier-Duchatel
- 👤 Bernard Verger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:45
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
82 words
Electrochemical method for producing oxygen, comprising successively: reacting air in a basic medium with the reduced form of the anthraquinone 2-7 disulphonate of an alkali metal to form a peroxide which spontaneously decomposes into (i) hydrogen peroxide and (ii) the oxidised form of said anthraquinone; electrochemically oxidising said hydrogen peroxide to form oxygen; recovering said oxygen; electrochemically reducing said oxidised form of said anthraquinone to regenerate said reduced form of said anthraquinone; and recycling said reduced form, to react with said air.
Claim 2
Dependent Claim
82 words
Electrochemical method for producing oxygen, comprising successively: reacting air in a basic medium with the reduced form of the anthraquinone 2-7 disulphonate of an alkali metal to form a peroxide which spontaneously decomposes into (i) hydrogen peroxide and (ii) the oxidised form of said anthraquinone; electrochemically oxidising said hydrogen peroxide to form oxygen; recovering said oxygen; electrochemically reducing said oxidised form of said anthraquinone to regenerate said reduced form of said anthraquinone; and recycling said reduced form, to react with said air.
Claim 3
Dependent Claim
11 words
Method according to claim 1, wherein said alkali metal is sodium.
Claim 4
Dependent Claim
11 words
Method according to claim 2, wherein said alkali metal is lithium.
Claim 5
Dependent Claim
16 words
Method according to claim 3, wherein said basic medium is an aqueous solution of potassium hydroxide.
Claim 6
Dependent Claim
44 words
Method according to claim 4, characterized in that the said oxidation and the said electrochemical reduction are effected at a difference in potential equal to the difference between the oxide reduction potential of the said anthraquinone and the electrochemical oxidation potential of hydrogen peroxide.
Claim 7
Dependent Claim
16 words
Method according to claim 2, wherein said basic medium is an aqueous solution of potassium hydroxide.
Claim 8
Dependent Claim
44 words
Method according to claim 6, characterized in that the said oxidation and the said electrochemical reduction are effected at a difference in potential equal to the difference between the oxide reduction potential of the said anthraquinone and the electrochemical oxidation potential of hydrogen peroxide.
Claim 9
Dependent Claim
40 words
Method according to claim 6, wherein the mixture of hydrogen peroxide and the oxidized form of said anthraquinone formed by said spontaneous decomposition is positioned in an anode compartment of an electrochemical cell wherein said hydrogen peroxide is electrochemica-ly oxidized.
Claim 10
Dependent Claim
17 words
Method according to claim 1, wherein said basic medium is an aqueous solution of an alkaline hydroxide.
Claim 11
Dependent Claim
44 words
Method according to claim 1, characterized in that the said oxidation and the said electrochemical reduction are effected at a difference in potential equal to the difference between the oxide reduction potential of the said anthraquinone and the electrochemical oxidation potential of hydrogen peroxide.
Claim 12
Dependent Claim
16 words
Method according to claim 1, wherein said basic medium is an aqueous solution of potassium hydroxide.
Claim 13
Dependent Claim
40 words
Method according to claim 1, wherein the mixture of hydrogen peroxide and the oxidized form of said anthraquinone formed by said spontaneous decomposition is positioned in an anode compartment of an electrochemical cell wherein said hydrogen peroxide is electrochemically oxidized.
References Cited (Backward Citations)
US1891974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-05 | 1981-06-06 | 1981-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-05 | 1985-06-06 | 1985-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-05 | 1989-06-06 | 1989-12-06 | $7700.00 | Window Closed / Lapsed |