US3887696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for heterogeneous catalysis of a chemical reaction, particularly catalytic decomposition of hydrogen peroxide
Assignee: REPUBLIC OF FRANCE
•
Filing: 1972-12-26
•
Granted: 1975-06-03
•
Expires: 1992-12-26
Abstract
Abstract The invention relates to a process of heterogeneous catalysis of a chemical reaction in the liquid phase, applied especially to the catalytic decomposition of aqueous solutions of hydrogen peroxide. The process of the invention is characterized in that the catalyst that is used is subjected to a voltage which has the effect of electrochemically polarizing it. The process is applied to development of an oxygen generator with controllable output which comprises: a direct current generator, a catalysis chamber in which there is effected the catalytic decomposition of a solution of hydrogen peroxide, producing a release of oxygen, comprising at least two electrodes one of which is constituted by a catalyst of the said decomposition, a buffer chamber that collects the released oxygen, associated with a pressure sensor, and a voltage control device for the said electrodes, controlled by the said pressure sensor.
Inventors
- 👤 Michel Louis Bernard
- 👤 Gerard Coudrin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:46
CPC Classifications
C; C01; C01B; C01B13/00; C01B13/02; C01B13/0203; C01B13/0211; C01B13/0214; B; B01; B01J; B01J35/00; B01J35/30; B01J35/33
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
95 words
In a process of heterogeneous catalysis of a chemical reaction comprising catalytic decomposition of aqueous solutions of hydrogen peroxide, the catalyst utilized being metallic and belonging to the class constituted by transition elements of groups I, VI, VII and VIII, the improvement comprising subjecting the said catalyst to a cathode or alternating voltage which has the effect of electrochemically polarizing it and increasing the catalytic reaction at said catalyst cathode, the nature of the catalyst and the level of the applied voltage being such as to effect release of oxygen primarily at the catalyst cathode.
Claim 2
Dependent Claim
95 words
In a process of heterogeneous catalysis of a chemical reaction comprising catalytic decomposition of aqueous solutions of hydrogen peroxide, the catalyst utilized being metallic and belonging to the class constituted by transition elements of groups I, VI, VII and VIII, the improvement comprising subjecting the said catalyst to a cathode or alternating voltage which has the effect of electrochemically polarizing it and increasing the catalytic reaction at said catalyst cathode, the nature of the catalyst and the level of the applied voltage being such as to effect release of oxygen primarily at the catalyst cathode.
Claim 3
Dependent Claim
71 words
IN A PROCESS OF HETEROGENEOUS CATALYSIS OF A CHEMICAL REACTION COMPRISING CATALYTIC DECOMPOSITION OF AQUEOUS SOLUTIONS OF HYDROGEN PEROXIDE, THE CATALYST UTILIZED BEING METALLIC AND BELONGING TO THE CLASS CONSTITUTED BY TRANSITION ELEMENTS OF GROUPS I, VI, VII AND VIII, THE IMPROVEMENT COMPRISING SUBJECTING THE SAID CATALYST TO A CATHODE OR ALTERNATING VOLTAGE WHICH HAS THE EFFECT OF ELECTROCHEMICALLY POLARIZING IT AND INCREASING THE CATALYTIC REACTION AT SAID CATALYST CATHODE, THE
Claim 4
Dependent Claim
71 words
IN A PROCESS OF HETEROGENEOUS CATALYSIS OF A CHEMICAL REACTION COMPRISING CATALYTIC DECOMPOSITION OF AQUEOUS SOLUTIONS OF HYDROGEN PEROXIDE, THE CATALYST UTILIZED BEING METALLIC AND BELONGING TO THE CLASS CONSTITUTED BY TRANSITION ELEMENTS OF GROUPS I, VI, VII AND VIII, THE IMPROVEMENT COMPRISING SUBJECTING THE SAID CATALYST TO A CATHODE OR ALTERNATING VOLTAGE WHICH HAS THE EFFECT OF ELECTROCHEMICALLY POLARIZING IT AND INCREASING THE CATALYTIC REACTION AT SAID CATALYST CATHODE, THE
Claim 5
Dependent Claim
18 words
Process as in claim 1, characterized in that the said catalyst is metallic silver or a silver compound.
Claim 6
Dependent Claim
22 words
Process as in claim 1, characterized in that the said catalyst is a triad element, or a compound of the said element.
Claim 7
Dependent Claim
22 words
Process as in claim 1, characterized in that the said catalyst is platinum, or a platinum compound, or a platinum metal compound.
Claim 8
Dependent Claim
31 words
A process as claimed in claim 1 wherein there is added to the solution of hydrogen peroxide a salt or a compound which ensures a high electroconductivity of the said solution.
Claim 9
Dependent Claim
29 words
Process as in claim 1, characterized in that there is added to the hydrogen peroxide solution a salt or a compound that fixes the pH of the said solution.
Claim 10
Dependent Claim
24 words
Process as in claim 1, characterized in that there is added to the said solution a compound that inhibits the decomposition of hydrogen peroxide.
Claim 11
Dependent Claim
15 words
Process as in claim 7, characterized in that the said inhibitor compound is a phosphate.
References Cited (Backward Citations)
US3520137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |