US4579838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalysts and hydroconversion processes utilizing the same
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1985-04-29
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Granted: 1986-04-01
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Expires: 2005-04-29
Abstract
Abstract A catalyst is prepared by heating the reaction product of CrO3 and tert-butyl alcohol as catalyst precursor in a hydrocarbon medium in the presence of hydrogen sulfide to convert the catalyst precursor to a solid chromium-containing catalyst. Hydroconversion processes utilizing the catalyst to convert oil, coal, and mixtures thereof are also provided.
Inventors
- 👤 Roby Bearden, Jr.
- 👤 Clyde L. Aldridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:49
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/26; C; C10; C10G; C10G1/00; C10G1/08; C10G1/086; C10G47/00; C10G47/02; C10G47/06; C10G47/24; C10G47/26
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
91 words
A catalyst prepared by the steps which comprise: (a) forming a mixture of a hydrocarbon material and the reaction product of CrO 3 and tert-butyl alcohol, said reaction product having been obtained by reacting tert-butyl alcohol with CrO 3 at ambient temperature, and (b) heating the resulting mixture in the presence of a hydrogen sulfide-containing gas at conditions, including a temperature of at least about 500° F. and a total pressure ranging from about 50 to 5000 psig, to produce a slurry comprising said hydrocarbon material and a solid chromium-containing catalyst.
Claim 2
Dependent Claim
91 words
A catalyst prepared by the steps which comprise: (a) forming a mixture of a hydrocarbon material and the reaction product of CrO 3 and tert-butyl alcohol, said reaction product having been obtained by reacting tert-butyl alcohol with CrO 3 at ambient temperature, and (b) heating the resulting mixture in the presence of a hydrogen sulfide-containing gas at conditions, including a temperature of at least about 500° F. and a total pressure ranging from about 50 to 5000 psig, to produce a slurry comprising said hydrocarbon material and a solid chromium-containing catalyst.
Claim 3
Dependent Claim
20 words
The catalyst of claim 1 wherein said conditions of step (b) include a temperature of at least about 500° F.
Claim 4
Dependent Claim
13 words
The catalyst of claim 1 wherein said hydrogen sulfide-containing gas also comprises hydrogen.
Claim 5
Dependent Claim
15 words
The catalyst of claim 1 wherein said hydrocarbon material comprises constituents boiling above 1050° F.
Claim 6
Dependent Claim
37 words
The catalyst of claim 1 wherein said reaction product is present in said mixture of step (a) in an amount ranging from about 0.001 to 2 weight percent, calculated as elemental chromium, based on said hydrocarbon material.
Claim 7
Dependent Claim
35 words
The catalyst of claim 1 wherein said reaction product is present in said mixture of step (a) in an amount ranging from about 0.05 to 2 weight percent, said mixture being a catalyst precursor concentrate.
Claim 8
Dependent Claim
25 words
The catalyst of claim 6 wherein said resulting mixture of step (b) is said catalyst precursor concentrate and wherein said slurry is a catalyst concentrate.
Claim 9
Dependent Claim
15 words
The catalyst of claim 1 wherein said solid chromium-containing catalyst is recovered from said slurry.
Claim 10
Dependent Claim
17 words
The catalyst of claim 1 wherein said hydrogen sulfide-containing gas comprises from 1 to 100 mole percent.
Claim 11
Dependent Claim
34 words
The catalyst of claim 1 wherein said tert-butyl alcohol is reacted with CrO 3 at a mole ratio of tert-butyl alcohol to CrO 3 ranging from 0.5 to 30.0 to produce said reaction product.
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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) | 1989-03-31 | 1989-09-30 | 1990-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-31 | 1993-09-30 | 1994-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-31 | 1997-09-30 | 1998-04-01 | $7700.00 | Window Closed / Lapsed |