Patent US4451354A successfully refreshed from Google Patents.
US4451354A
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Process for upgrading hydrocarbonaceous oils
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1983-01-03
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Granted: 1984-05-29
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Expires: 2003-01-03
Abstract
Abstract A process for upgrading a heavy hydrocarbonaceous oil is provided in which the heavy oil is hydrorefined in the presence of a hydrorefining catalyst at conditions to convert a portion of the heavy constituents of the oil, followed by cracking the hydrorefined oil in the presence of the hydrogen donor diluent. The hydrorefining and cracking stages are conducted at a relatively low hydrogen partial pressure while obtaining a high level of conversion of the heavy constituents of the oil.
Inventors
- 👤 Gordon F. Stuntz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:51
CPC Classifications
C; C10; C10G; C10G65/00; C10G65/02; C10G65/12; C10G2300/00; C10G2300/10; C10G2300/107
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
178 words
A process for upgrading a sulfur-containing heavy hydrocarbonaceous oil feed comprising heavy constituents, including at least 10 volume percent materials boiling above 1050° F., which consists essentially of the steps of: (a) contacting said heavy oil feed with a hydrorefining catalyst in the presence of added molecular hydrogen in a hydrorefining zone at hydrorefining conditions such as to convert at least a portion of the heavy constituents of said oil to lower boiling hydrocarbons, said hydrorefining conditions including a temperature ranging from about 680° to 775° F. and a hydrogen partial pressure ranging from about 800 to about 1500 psig to produce a hydrorefined oil; (b) contacting at least a portion of said hydrorefined oil in the presence of a hydrogen donor diluent and of molecular hydrogen in a cracking zone to crack at least an additional portion of said heavy constituents to lower boiling hydrocarbon, said cracking conditions including a temperature ranging from about 775° to 850° F. and a hydrogen partial pressure ranging from about 250 to 1500 psig; and (c) recovering an upgraded hydrocarbonaceous oil.
Claim 2
Dependent Claim
178 words
A process for upgrading a sulfur-containing heavy hydrocarbonaceous oil feed comprising heavy constituents, including at least 10 volume percent materials boiling above 1050° F., which consists essentially of the steps of: (a) contacting said heavy oil feed with a hydrorefining catalyst in the presence of added molecular hydrogen in a hydrorefining zone at hydrorefining conditions such as to convert at least a portion of the heavy constituents of said oil to lower boiling hydrocarbons, said hydrorefining conditions including a temperature ranging from about 680° to 775° F. and a hydrogen partial pressure ranging from about 800 to about 1500 psig to produce a hydrorefined oil; (b) contacting at least a portion of said hydrorefined oil in the presence of a hydrogen donor diluent and of molecular hydrogen in a cracking zone to crack at least an additional portion of said heavy constituents to lower boiling hydrocarbon, said cracking conditions including a temperature ranging from about 775° to 850° F. and a hydrogen partial pressure ranging from about 250 to 1500 psig; and (c) recovering an upgraded hydrocarbonaceous oil.
Claim 3
Dependent Claim
59 words
The process of claim 1, wherein said hydrorefining conditions include a temperature ranging from about 700° F. to 750° F. and a pressure ranging from about 800 to 1100 psig and wherein said cracking conditions include a temperature ranging from about 800° F. to about 840° F. and a hydrogen partial pressure of about 800 to about 1100 psig.
Claim 4
Dependent Claim
36 words
The process of claim 1, wherein said hydrogen donor diluent in said cracking zone of step (b) is present in a volumetric ratio of hydrogen donor diluent to said hydrorefined oil of about 0.5:1 to 2.0:1.
Claim 5
Dependent Claim
38 words
The process of claim 1, wherein said upgraded oil recovered in step (c) is separated into fractions, including an intermediate boiling fraction, and wherein at least a portion of said intermediate fraction is recycled to said hydrorefining zone.
Claim 6
Dependent Claim
44 words
The process of claim 1, wherein said upgraded oil recovered in step (c) is separated into fractions, including an intermediate boiling fraction, and wherein at least a portion of said intermediate fraction is hydrogenated and said hydrogenated fraction is recycled to said cracking zone.
Claim 7
Dependent Claim
37 words
The process of claim 1, wherein said hydrorefining catalyst comprises a hydrogenation component selected from the group consisting of a Group VIB metal component and a Group VIII metal component and mixtures thereof composited with a support.
Claim 8
Dependent Claim
55 words
The process of claim 1 wherein said sulfur-containing heavy hydrocarbonaceous oil feed comprises constituents boiling above 975° F. and wherein the space velocity of said oil in said hydrorefining zone is adjusted to provide from about 20 to about 60 weight percent conversion of materials boiling above 975° F. to materials boiling below 975° 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) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |