US3919406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermochemical production of hydrogen
Assignee: United States Department of Energy
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Filing: 1974-07-10
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Granted: 1975-11-11
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Expires: 1994-07-10
Abstract
Abstract Hydrogen is produced by reacting cuprous chloride with hydrochloric acid. The reaction may be combined to form a thermochemical closed process for producing hydrogen by a series of four reactions utilizing chlorides of copper and magnesium, hydrochloric acid, and magnesium oxide to break water down into its constituent elements.
Inventors
- 👤 Warren R Grimes
- 👤 Carlos E Bamberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:47
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/06; C01B3/103; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/36
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
30 words
A PROCESS FOR GENERATING HYDROGEN, COMPRISING THE STEPS OF: ADDING CUCL TO A LIQUID SOLVENT FOR CUCL2; MAINTAINING SAID SOLENT AT A TEMPERATURE WITHIN THE RANGE OF 298* TO 600*K;
Claim 2
Dependent Claim
30 words
A PROCESS FOR GENERATING HYDROGEN, COMPRISING THE STEPS OF: ADDING CUCL TO A LIQUID SOLVENT FOR CUCL2; MAINTAINING SAID SOLENT AT A TEMPERATURE WITHIN THE RANGE OF 298* TO 600*K;
Claim 3
Dependent Claim
106 words
The process according to claim 1 further comprising: decomposing said CuCl2 by heating to produce CuCl and Cl2; using the CuCl in said step of reacting; reacting said Cl2 with MgO to produce MgCl2 and O2; separating said O2 from the reaction environment as a by-product; separating said MgCl2 from the reaction environment; reacting said MgCl2 with water to produce MgO and HCl; separating said produced MgO from the reaction environment; using the separated MgO as a reactant in said second-mentioned step of reacting; separating said produced HCl from the reaction environment; and using said separated HCl as a reactant in said first-mentioned step of reacting.
Claim 4
Dependent Claim
24 words
The process according to claim 1 wherein said solvent is selected from the group consisting of dimethyl formamide and the chloride of dimethyl formamide.
Claim 5
Dependent Claim
18 words
The process according to claim 1 wherein said solvent is a mixture of aluminum-sodium-chloride and aluminum potassium chloride.
References Cited (Backward Citations)
US1489525A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |