Patent US2920327A successfully refreshed from Google Patents.
US4863712A
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US
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Catalysts for reforming hydrocarbon feedstocks
Assignee: Johnson Matthey PLC
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Filing: 1988-12-30
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Granted: 1989-09-05
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Expires: 2008-12-30
Abstract
Abstract A catalyst, or a precursor thereto, comprises, as the active material or as a support therefor, a ceramic foam having a network of irregular passages extending therethrough, said passages having an average minimum dimension in the range 20 to 300 μm, said foam having a total porosity in the range 40 to 85% and an apparent density of at least 0.7 g. cm-3. The foam may be made by forming a negative replica of an open cell plastics foam by impregnation of the latter with a dispersion of the ceramic material, followed by drying and calcining the impregnated foam to remove the plastics material and to cause the ceramic material to sinter. For a steam reforming catalyst the ceramic may be alpha alumina and the active material nickel and/or cobalt.
Inventors
- 👤 Martyn V. Twigg
- 👤 William M. Sengelow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:13
CPC Classifications
C; C04; C04B; C04B38/00; C04B38/06; C04B38/0615; B; B01; B01J; B01J35/00; B01J35/50; B01J35/56; B01J35/60; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/38; C01B3/40; B01J2235/00; B01J35/30; B01J35/31; B01J35/32; B01J35/61; B01J35/612; B01J35/63; B01J35/633; C01B2203/00; C01B2203/10; C01B2203/1041; C01B2203/1047; C04B2111/00; C04B2111/00474; C04B2111/0081; C04B2111/10; C04B2111/1056; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
79 words
A steam reforming process wherein a hydrocarbon feedstock is reacted with steam and/or carbon dioxide in the presence of a catalyst comprising nickel and/or cobalt supported on shaped pieces of a silica-free ceramic foam having a network of irregular passages extending therethrough, said passages having an average minimum dimension in the range 20 to 300 μm, said foam having a total porosity in the range 40 to 85% and an apparent density of at least 0.7 g.cm -3 .
Claim 2
Dependent Claim
79 words
A steam reforming process wherein a hydrocarbon feedstock is reacted with steam and/or carbon dioxide in the presence of a catalyst comprising nickel and/or cobalt supported on shaped pieces of a silica-free ceramic foam having a network of irregular passages extending therethrough, said passages having an average minimum dimension in the range 20 to 300 μm, said foam having a total porosity in the range 40 to 85% and an apparent density of at least 0.7 g.cm -3 .
Claim 3
Dependent Claim
20 words
A process according to claim 1 wherein the silica free ceramic foam is a calcium aluminate or alpha alumina foam.
Claim 4
Dependent Claim
22 words
A process according to claim 1 wherein the process is effected at a pressure in the range 1 to 50 bar abs.
Claim 5
Dependent Claim
18 words
A process according to claim 1 wherein the outlet temperature is in the range 700° to 1100° C.
Claim 6
Dependent Claim
20 words
A process according to claim 1 wherein the heat required for the reaction is supplied from an external heat source.
Claim 7
Dependent Claim
17 words
A process according to claim 1 wherein the reforming process follows partial combustion with an oxygen-containing gas.
Claim 8
Dependent Claim
21 words
A process according to claim 1 wherein the ceramic foam has an apparent density of at least 1 g.cm -3 .
Claim 9
Dependent Claim
23 words
A process according to claim 7 wherein the ceramic foam has an apparent density in the range 1 to 2.5 g.cm -3 .
Claim 10
Dependent Claim
24 words
A process according to claim 1 wherein the ceramic foam has a megaporosity constituting 60 to 90% of the total porosity of the foam.
Claim 11
Dependent Claim
26 words
A process according to claim 1 wherein the ceramic foam has a total pore volume in the range 0.2 to 1.5 cm 3 .g -1 .
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) | 1992-09-04 | 1993-03-06 | 1993-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-04 | 1997-03-06 | 1997-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-04 | 2001-03-06 | 2001-09-05 | $7700.00 | Window Closed / Lapsed |