US3624176A
Expired / Lapsed
US
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Catalytic process for producing gas mixtures having high ethylene contents
Assignee: Azote et Produits Chimiques SA
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Filing: 1969-06-23
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Granted: 1971-11-30
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Expires: 1989-06-23
Abstract
Abstract Process for the catalytic steam reforming in a fluidized bed of light and heavy hydrocarbons, with the object of obtaining mixtures with a high ethylene and propylene content, in which the reforming in a fluidized bed is carried out under a pressure capable of reaching 50 bars absolute, in the presence of stable catalyst compositions without dehydrogenating metal or little dehydrogenating metal, composed of refractory oxides of limited porosity and with specific surfaces which are between 0.02 and 10 m2/g., with a grain size between 50 Mu and 5 mm., resistant to the temperatures of the fluidized bed which are between 650* and 900* C. and to the pressure, without regeneration of the said compositions.
Inventors
- 👤 Pierre Lhonore
- 👤 Jacques Quibel
- 👤 Michel Senes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:44
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/06; C03C17/09; C03C2217/00; C03C2217/20; C03C2217/25; C03C2217/251; C03C2218/00; C03C2218/10; C03C2218/15; C10; C10G; C10G2400/00; C10G2400/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
99 words
A process in accordance with claim 1, in which the steam reforming is carried out in the presence of a catalyst composition containing at least one metal of a group formed by the rare earths, of which the content calculated as oxide is between 1 and 4 percent by weight, in association with a mixture of refractory oxides rich in magnesium oxide, of which the content by weight is between 30 and 70 percent, and containing zirconium dioxide, of which the content by weight is between 25 and 40 percent, the total catalyst composition equaling 100 percent by weight.
Claim 2
Dependent Claim
54 words
A process in accordance with claim 1, in which the steam reforming is effected in the presence of a catalyst composition containing a small content by weight up to about 1.75 percent of an oxide which can be reduced, selected from the group consisting of ferrous oxide Fe2O3, ferric oxide Fe3O4, and mixtures thereof.
Claim 3
Dependent Claim
102 words
A process in accordance with claim 1, in which the steam reforming is effected in the presence of a catalyst composition containing a small content by weight up to about 1.75 percent of an oxide which can be reduced, selected from the group consisting of ferrous oxide Fe2O3, ferric oxide Fe3O4 and a high content of magnesium oxide which content is between 50 and 70 percent by weight, and which represents the major proportion of the refractory oxides, the content of aluminum oxide being at most equal to 20 percent by weight and the total catalyst composition equaling 100 percent by weight.
Claim 4
Dependent Claim
32 words
Catalytic reforming process in a fluidized bed, according to claim 1, in which the reforming mixture is introduced on to the catalyst at a temperature which is between 200* and 600* C.
Claim 5
Dependent Claim
25 words
Catalytic reforming process in a fluidized bed, according to claim 1, in which the temperature of the fluidized bed is between 700* and 850* C.
Claim 6
Dependent Claim
26 words
Catalytic reforming process in a fluidized bed, according to claim 1, in which the steam ratio H2O/C, calculated by weight, is between 0.5 and 4 .
Claim 7
Dependent Claim
24 words
A process in accordance with claim 5 wherein said reforming mixture is introduced to the catalyst at a temperature between 250* and 550* C.
Claim 8
Dependent Claim
17 words
A process in accordance with claim 7 wherein said steam ratio H2O/C is between 1 and 3.
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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |