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Patent US4200623A successfully refreshed from Google Patents.
US4200623A
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Process for the preparation of a hydrogen reserve
Assignee: Compagnie Francaise de Raffinage SA
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Filing: 1978-10-25
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Granted: 1980-04-29
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Expires: 1998-10-25
Abstract
Abstract The preparation of hydrogen reserves by mixing magnesium with at least one other appropriate element, compacting the mixture obtained, and hydrogenating it. Such additional element includes at least one element selected from the group consisting of group IIIB, including the rare earths, and groups IVB, VIB, VIIB, VIII, and IA of the periodic table. In particular, the mixture is subjected to a heat treatment between the compacting and hydrogenation steps. Such reserves prepared have reversible capacities even at moderate temperatures.
Inventors
- 👤 Alain Muller
- 👤 Philippe Engelhard
- 👤 Joseph E. Weisang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:51
CPC Classifications
F; F17; F17C; F17C11/00; F17C11/005; C; C01; C01B; C01B3/00; C01B3/0005; C01B3/001; C01B3/0078; C01B6/00; C01B6/04; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/32; Y10; Y10S; Y10S420/00; Y10S420/90
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
65 words
A process for the preparation of a hydrogen reserve comprising the steps of (a) mixing of powdered magnesium with a powder of two elements or at least an alloy thereof selected from the group consisting of; (b) compacting of the mixture obtained in step (a); (c) heating the compacted mixture to a temperature of between 400° and 1,600° C.; and (d) hydrogenating the compacted mixture.
Claim 2
Dependent Claim
65 words
A process for the preparation of a hydrogen reserve comprising the steps of (a) mixing of powdered magnesium with a powder of two elements or at least an alloy thereof selected from the group consisting of; (b) compacting of the mixture obtained in step (a); (c) heating the compacted mixture to a temperature of between 400° and 1,600° C.; and (d) hydrogenating the compacted mixture.
Claim 3
Dependent Claim
16 words
Process in accordance with claim 1, wherein said heat treatment is between 600° and 1,100° C.
Claim 4
Dependent Claim
22 words
Process in accordance with claim 2, wherein the heat treatment is effected under an atmosphere that is inert relative to the supply.
Claim 5
Dependent Claim
22 words
Process in accordance with claim 1, wherein the heat treatment is effected under an atmosphere that is inert relative to the supply.
Claim 6
Dependent Claim
17 words
Process in accordance with claim 3, wherein said two elements are in the form of an alloy.
Claim 7
Dependent Claim
14 words
Process in accordance with claim 3, wherein said two elements are in metallic form.
Claim 8
Dependent Claim
31 words
Process in accordance with claim 3, wherein the hydrogenation of the mixture is effected at a temperature between 20° and 500° C. and at a pressure between 0.1 and 200 bars.
Claim 9
Dependent Claim
31 words
Process in accordance with claim 3, wherein the hydrogenation of the mixture is effected at a temperature between 150° and 380° C. and at a pressure between 10 and 100 bars.
Claim 10
Dependent Claim
23 words
Process in accordance with claims 2, 3, 4, 5, 6, 7, or 8 wherein the reserve contains at least 54 wt. % magnesium.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-29 | 1983-10-29 | 1984-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-29 | 1987-10-29 | 1988-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-29 | 1991-10-29 | 1992-04-29 | $7700.00 | Window Closed / Lapsed |