US4707351A
Expired / Lapsed
US
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Catalyst and catalytic process
Assignee: Imperial Chemical Industries Ltd
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Filing: 1986-01-14
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Granted: 1987-11-17
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Expires: 2006-01-14
Abstract
Abstract Reforming a hydrocarbon, or hydrocarbon derivative, feedstock with steam and/or carbon dioxide using saddle shaped units made of a low silica calcium aluminate cement composition as the catalyst support. The support preferably has a surface area of at least 0.5 m2g-1 and a pore volume of at least 0.1 cm3g-1.
Inventors
- 👤 Leslie W. Lord
- 👤 Kevin Kendall
- 👤 David T. Williams
- 👤 John H. Bateson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:20
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/74; C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/323; C01B3/3231; C01B3/326; C01B3/34; C01B3/38; C01B3/40; B01J35/00; B01J35/30; B01J35/34; B01J35/36; B01J35/37; B01J35/50; B01J35/55; C01B2203/00; C01B2203/10; C01B2203/1041; C01B2203/1047; C01B2203/1052; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
107 words
A process of reacting a hydrocarbon, or hydrocarbon derivative, with steam, and/or carbon dioxide, over a catalytically active material to produce a gas containing hydrogen characterised in that the catalytically active material is supported by a calcined refractory oxide catalyst support having a saddle configuration, a surface area of at least 0.5 m 2 g -1 , and a pore volume of at least 0.1 cm 3 g -1 , said calcined refractory oxide support containing less than 1% by weight of silica and consisting of a calcined calcium aluminate cement composition containing less than 50% by weight of oxidic material other than calcium aluminate and alumina.
Claim 2
Dependent Claim
107 words
A process of reacting a hydrocarbon, or hydrocarbon derivative, with steam, and/or carbon dioxide, over a catalytically active material to produce a gas containing hydrogen characterised in that the catalytically active material is supported by a calcined refractory oxide catalyst support having a saddle configuration, a surface area of at least 0.5 m 2 g -1 , and a pore volume of at least 0.1 cm 3 g -1 , said calcined refractory oxide support containing less than 1% by weight of silica and consisting of a calcined calcium aluminate cement composition containing less than 50% by weight of oxidic material other than calcium aluminate and alumina.
Claim 3
Dependent Claim
47 words
A process according to claim 1 wherein said calcined low silica calcium aluminate cement composition has a calcium to aluminium atomic ratio in the range 1:4 to 1:10 and contains no more than 10% by weight of oxidic material other than calcium aluminate, calcium oxide, and alumina.
Claim 4
Dependent Claim
53 words
A process according to claim 1 wherein said supported catalytically active material is randomly disposed in externally heated tubes through which the hydrocarbon, or hydrocarbon derivative, and steam and/or carbon dioxide is passed, and wherein the radius of maximum lengthwise curvature of the saddles is between 0.03 and 0.2 times the tube diameter.
Claim 5
Dependent Claim
48 words
A process according to claim 1 wherein the angle subtended at the centre of maximum lengthwise curvature by the ends of the saddle and the angle subtended at the centre of maximum widthwise curvature by the sides of the saddle are each in the range 150° to 180°.
Claim 6
Dependent Claim
24 words
A process according to claim 1 wherein the saddle thickness is 0.2 to 0.5 times the radius of maximum lengthwise curvature of the saddle.
Claim 7
Dependent Claim
24 words
A process according to claim 1 wherein the radius of minimum lengthwise curvature is at least 0.2 times the radius of maximum lengthwise curvature
Claim 8
Dependent Claim
15 words
A process according to claim 1 wherein said catalytically active material is nickel and/or cobalt.
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) | 1990-11-16 | 1991-05-18 | 1991-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-16 | 1995-05-18 | 1995-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-16 | 1999-05-18 | 1999-11-17 | $7700.00 | Window Closed / Lapsed |