US4376759A
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Cyclic process for making hydrogen
Assignee: Individual
•
Filing: 1981-02-10
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Granted: 1983-03-15
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Expires: 2001-02-10
Abstract
Abstract Nitric oxide, an odd-electron molecule, has been found to react with m-phosphoric acid to displace hydrogen and form nitrosyl m-phosphate. The addition of water to the nitrosyl salt regenerates the m-phosphoric acid, half the nitric oxide and the other half as nitrogen dioxide which can then be converted to nitric oxide in an oxidation process. These reactions thus form a cyclic process for obtaining hydrogen from water with low level energy.
Inventors
- 👤 Newell C. Cook
- 👤 Gary C. Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:49
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; Y; Y02; Y02P; Y02P20/00; Y02P20/10; Y02P20/129; Y02P20/133
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
81 words
The cyclic process of producing hydrogen from water which comprises the steps of contacting nitric oxide with an anhydrous acid selected from the group consisting of meta-phosphoric acid, meta-boric acid, meta-silicic acid, meta-aluminic acid and mixtures thereof at a temperature between 200° and 400° C., separating and removing the resulting hydrogen gas from its co-product anhydrous nitrosyl meta-salt, then regenerating the said anhydrous meta-acid by contacting the anhydrous nitrosyl meta-salt with water and thereby simultaneously forming nitric oxide and nitrogen dioxide.
Claim 2
Dependent Claim
81 words
The cyclic process of producing hydrogen from water which comprises the steps of contacting nitric oxide with an anhydrous acid selected from the group consisting of meta-phosphoric acid, meta-boric acid, meta-silicic acid, meta-aluminic acid and mixtures thereof at a temperature between 200° and 400° C., separating and removing the resulting hydrogen gas from its co-product anhydrous nitrosyl meta-salt, then regenerating the said anhydrous meta-acid by contacting the anhydrous nitrosyl meta-salt with water and thereby simultaneously forming nitric oxide and nitrogen dioxide.
Claim 3
Dependent Claim
37 words
The process of claim 1, including the steps of separating and removing the nitrogen dioxide, reducing the nitrogen dioxide to nitric oxide, and contacting nitric oxide with the regenerated anhydrous acid in a repetition of the cycle.
Claim 4
Dependent Claim
13 words
The process of claim 1 in which the anhydrous acid is meta-phosphoric acid.
Claim 5
Dependent Claim
32 words
The process of claim 1 in which the anhydrous acid is meta-phosphoric acid and in which the nitric oxide is contacted with the meta-phosphoric acid at temperature between 200° and 400° C.
Claim 6
Dependent Claim
23 words
The process of claim 1, including the step of separating and removing the gaseous hydrogen from the reaction mixture as it is formed.
Claim 7
Dependent Claim
31 words
The process of claim 1 in which the hydrogen gas is removed from its co-product nitrosyl meta-salt by diffusing the hydrogen gas as it is formed through a hydrogen-permeable palladium membrane.
Claim 8
Dependent Claim
64 words
The process for the production of hydrogen which comprises the steps of bringing nitric oxide into contact with an anhydrous acid selected from the group consisting of meta-phosphoric acid, meta-boric acid, meta-silicic acid, meta-aluminic acid and mixtures thereof at a temperature between 200° and 400° C., reacting the nitric oxide with the said acid, and separating the resulting gaseous hydrogen from the reaction mixture.
Claim 9
Dependent Claim
64 words
The process for the production of hydrogen which comprises the steps of bringing nitric oxide into contact with an anhydrous acid selected from the group consisting of meta-phosphoric acid, meta-boric acid, meta-silicic acid, meta-aluminic acid and mixtures thereof at a temperature between 200° and 400° C., reacting the nitric oxide with the said acid, and separating the resulting gaseous hydrogen from the reaction mixture.
Claim 10
Dependent Claim
13 words
The process of claim 7 in which the anhydrous acid is meta-phosphoric acid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-14 | 1986-09-13 | 1987-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-14 | 1990-09-13 | 1991-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-14 | 1994-09-13 | 1995-03-15 | $7700.00 | Window Closed / Lapsed |