US4557822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroconversion process
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1982-12-27
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Granted: 1985-12-10
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Expires: 2002-12-27
Abstract
Abstract A process for the conversion of a hydrocarbonaceous oil in the presence of hydrogen and an iron-coal catalyst is provided in which a slurry of catalyst in the oil is treated with a hydrogen sulfide-containing gas at specified conditions prior to subjecting the slurry to hydroconversion conditions.
Inventors
- 👤 Roby Bearden, Jr.
- 👤 Clyde L. Aldridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:48
CPC Classifications
C; C10; C10G; C10G67/00; C10G67/02; B; B01; B01J; B01J37/00; B01J37/20; C10G29/00; C10G29/02; C10G47/00; C10G47/24; C10G47/26
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
136 words
In a hydroconversion process wherein a slurry comprising a hydrocarbonaceous oil and an iron-coal catalyst is contacted with a hydrogen-containing gas in a hydroconversion zone at hydroconversion conditions to convert at least a portion of said oil to lower boiling products and thereby produce a hydroconverted oil, said iron-coal catalyst being present in said slurry in an amount ranging from about 0.1 to 5 weight percent, based on said oil, the improvement which comprises pretreating said slurry with a substantially pure hydrogen sulfide or with a gaseous mixture comprising from about 1 to about 99 mole percent hydrogen sulfide, at a temperature below about 750° F., for a period of time ranging from about 30 seconds to 2 hours prior to subjecting said slurry to said hydroconversion conditions, including a temperature greater than said pretreatment temperature.
Claim 2
Dependent Claim
136 words
In a hydroconversion process wherein a slurry comprising a hydrocarbonaceous oil and an iron-coal catalyst is contacted with a hydrogen-containing gas in a hydroconversion zone at hydroconversion conditions to convert at least a portion of said oil to lower boiling products and thereby produce a hydroconverted oil, said iron-coal catalyst being present in said slurry in an amount ranging from about 0.1 to 5 weight percent, based on said oil, the improvement which comprises pretreating said slurry with a substantially pure hydrogen sulfide or with a gaseous mixture comprising from about 1 to about 99 mole percent hydrogen sulfide, at a temperature below about 750° F., for a period of time ranging from about 30 seconds to 2 hours prior to subjecting said slurry to said hydroconversion conditions, including a temperature greater than said pretreatment temperature.
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein said slurry is pretreated at a temperature ranging from about 650° F. to about 750° F.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein said gaseous mixture also comprises hydrogen.
Claim 5
Dependent Claim
21 words
The process of claim 1 wherein said pretreatment is conducted at a pressure ranging from about atmospheric pressure to 5000 psig.
Claim 6
Dependent Claim
21 words
The process of claim 1 wherein said catalyst comprises an iron compound convertible to iron sulfide by reaction with hydrogen sulfide.
Claim 7
Dependent Claim
22 words
The process of claim 1 wherein said hydroconversion conditions include a hydrogen partial pressure ranging from about 500 to about 5000 psig.
Claim 8
Dependent Claim
31 words
The process of claim 1 wherein the space velocity of said slurry is said hydroconversion zone ranges from 0.05 to 1 volumes of slurry per hour per volume of hydroconversion zone.
Claim 9
Dependent Claim
11 words
The process of claim 1 wherein said catalyst comprises iron sulfate.
Claim 10
Dependent Claim
19 words
The process of claim 1 wherein said slurry is pretreated at a temperature ranging from 700° to 745° F.
Claim 11
Dependent Claim
20 words
The process of claim 1 wherein said hydroconversion conditions include a temperature ranging from about 760° to about 900° 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) | 1988-12-09 | 1989-06-10 | 1989-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-09 | 1993-06-10 | 1993-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-09 | 1997-06-10 | 1997-12-10 | $7700.00 | Window Closed / Lapsed |