US4024171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum borate catalyst compositions and use thereof in chemical conversions
Assignee: Union Oil Company of California
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Filing: 1976-01-19
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Granted: 1977-05-17
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Expires: 1996-01-19
Abstract
Abstract Certain crystalline aluminum borate catalyst supports containing about 8-25 weight-percent of B 2 O 3 are found to provide unusually stable and active catalysts for high-temperature chemical conversions, particularly exhaust gas conversion, when prepared by precalcining shaped composites of alumina and boria at temperatures between about 1250° and 2600°F, prior to the addition thereto of active metal or metals. Calcination at below 1250° F is found to yield amorphous catalysts of inferior activity, while at temperatures above 2600° F drastic reductions in surface area may occur.
Inventors
- 👤 Dennis P. McArthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:28
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/74; B01J23/755; B01J21/00; B01J21/02; C; C07; C07C; C07C1/00; C07C1/02; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/755
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
71 words
A process for the hydrogenation of carbon oxides to produce methane, which comprises contacting a feed gas comprising hydrogen and an oxide of carbon with a catalyst comprising nickel dispersed on a porous, crystalline aluminum borate support at a temperature between about 600° and 1500° F, and recovering from said contacting a methane-enriched product gas, said aluminum borate support having a surface area of at least about 1 m 2 /g.
Claim 2
Dependent Claim
71 words
A process for the hydrogenation of carbon oxides to produce methane, which comprises contacting a feed gas comprising hydrogen and an oxide of carbon with a catalyst comprising nickel dispersed on a porous, crystalline aluminum borate support at a temperature between about 600° and 1500° F, and recovering from said contacting a methane-enriched product gas, said aluminum borate support having a surface area of at least about 1 m 2 /g.
Claim 3
Dependent Claim
24 words
A process as defined in claim 1 wherein at least a portion of said hydrogenation is carried out at temperatures above about 1200° F.
Claim 4
Dependent Claim
18 words
A process as defined in claim 1 wherein said catalyst comprises about 5-40 weight-percent of nickel as NiO.
Claim 5
Dependent Claim
29 words
A process as defined in claim 1 wherein said aluminum borate support has a B 2 O 3 /Al 2 O 3 weight ratio between about 8/92 and 25/75.
Claim 6
Dependent Claim
18 words
A process as defined in claim 4 wherein said catalyst comprises about 5-40 weight-percent of nickel as NiO.
Claim 7
Dependent Claim
101 words
A process for the hydrogenation of carbon oxides to produce methane, which comprises contacting a feed gas comprising hydrogen and carbon monoxide with a catalyst comprising nickel dispersed on a crystalline aluminum borate support at a temperature between about 600° and 1500° F, and recovering from said contacting a methane-enriched product gas, said catalyst having been prepared by the steps of: 1. intimately admixing finely divided alumina in a dry or hydrous state with sufficient boria or boria precursor to provide in the finished catalyst a B 2 O 3 /Al.sub. 2 O 3 weight ratio between about 8/92 and 25/75;
Claim 8
Dependent Claim
101 words
A process for the hydrogenation of carbon oxides to produce methane, which comprises contacting a feed gas comprising hydrogen and carbon monoxide with a catalyst comprising nickel dispersed on a crystalline aluminum borate support at a temperature between about 600° and 1500° F, and recovering from said contacting a methane-enriched product gas, said catalyst having been prepared by the steps of: 1. intimately admixing finely divided alumina in a dry or hydrous state with sufficient boria or boria precursor to provide in the finished catalyst a B 2 O 3 /Al.sub. 2 O 3 weight ratio between about 8/92 and 25/75;
Claim 9
Dependent Claim
81 words
forming the resulting mixture into aggregates of desired shape for catalytic contacting; 3. calcining the shaped aggregates for a time and at temperatures sufficient to form cohesive crystalline aluminum borate aggregates having a surface area between about 1 and 150 m 2 /g and a porosity of at least about 0.1 ml/g; 4. impregnating the calcined aggregates from step (3) with a nickel salt solution; and 5. calcining the impregnated aggregates to convert said nickel salt to a catalytically active form.
Claim 10
Dependent Claim
81 words
forming the resulting mixture into aggregates of desired shape for catalytic contacting; 3. calcining the shaped aggregates for a time and at temperatures sufficient to form cohesive crystalline aluminum borate aggregates having a surface area between about 1 and 150 m 2 /g and a porosity of at least about 0.1 ml/g; 4. impregnating the calcined aggregates from step (3) with a nickel salt solution; and 5. calcining the impregnated aggregates to convert said nickel salt to a catalytically active form.
Claim 11
Dependent Claim
24 words
A process as defined in claim 6 wherein at least a portion of said hydrogenation is carried out at temperatures above about 1200° F.
Claim 12
Dependent Claim
18 words
A process as defined in claim 6 wherein said catalyst comprises about 5-40 weight-percent of nickel as NiO.
Claim 13
Dependent Claim
23 words
A process as defined in claim 6 wherein said calcining in step (3) is carried out at between about 1250° and 2600° F.
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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) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |