US4298458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low pressure hydrotreating of residual fractions
Assignee: Mobil Oil AS
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Filing: 1980-02-25
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Granted: 1981-11-03
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Expires: 2000-02-25
Abstract
Abstract Cyclic hydrotreating of resids with low pressure, short term on-stream periods yields desirable products.
Inventors
- 👤 Frederick Banta
- 👤 Donald Milstein
- 👤 Alan W. Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:09
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/02; C10G47/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
145 words
In a process for hydrotreating of residual charge stock boiling above 650° F. to reduce sulfur, nitrogen and metal contaminants by contacting said charge stock and hydrogen with a fixed bed of a catalyst consisting essentially of a hydrogenation component supported on porous alumina at elevated temperature and pressure; the improvement for enhanced concurrent production of gasoline and distillate boiling below about 650° F. which comprises conducting said contacting at a high temperature of 850° to 950° F., a low pressure of 100 to 600 psig during a short contact period of high catalyst activity for production of gasoline and distillate at said conditions of temperature and pressure between about two hours and fifteen days, terminating said contacting at the end of said period, regenerating said catalyst by oxidation of combustible deposits thereon and again contacting the regenerated catalyst with said charge stock and hydrogen.
Claim 2
Dependent Claim
145 words
In a process for hydrotreating of residual charge stock boiling above 650° F. to reduce sulfur, nitrogen and metal contaminants by contacting said charge stock and hydrogen with a fixed bed of a catalyst consisting essentially of a hydrogenation component supported on porous alumina at elevated temperature and pressure; the improvement for enhanced concurrent production of gasoline and distillate boiling below about 650° F. which comprises conducting said contacting at a high temperature of 850° to 950° F., a low pressure of 100 to 600 psig during a short contact period of high catalyst activity for production of gasoline and distillate at said conditions of temperature and pressure between about two hours and fifteen days, terminating said contacting at the end of said period, regenerating said catalyst by oxidation of combustible deposits thereon and again contacting the regenerated catalyst with said charge stock and hydrogen.
Claim 3
Dependent Claim
34 words
A process according to claim 1 wherein said contacting is terminated while the product of said contacting contains at least 50% by volume based on said charge of liquid product boiling below 650° F.
Claim 4
Dependent Claim
34 words
A process according to claim 1 wherein said contacting is terminated while the product of said contacting contains at least 80% by volume based on said charge of liquid product boiling below 650° F.
Claim 5
Dependent Claim
14 words
A process according to claim 1 wherein said pressure is 100 to 300 psig.
Claim 6
Dependent Claim
13 words
A process according to claim 1 wherein said pressure is about 200 psig.
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) | 1984-11-02 | 1985-05-04 | 1985-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-02 | 1989-05-04 | 1989-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-02 | 1993-05-04 | 1993-11-03 | $7700.00 | Window Closed / Lapsed |