Patent US4396928A successfully refreshed from Google Patents.
Patent US4434045A successfully refreshed from Google Patents.
US4434045A
Expired / Lapsed
US
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Process for converting petroleum residuals
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1982-01-04
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Granted: 1984-02-28
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Expires: 2002-01-04
Abstract
Abstract An improved process for hydrocracking petroleum residuals wherein total conversion and the yield of lower boiling range products are increased. The hydrocracking is accomplished in the presence of a hydrogen donor solvent and molecular hydrogen. The conversion is accomplished at a pressure within the range from about 1500 to about 2500 psig and at a temperature within the range from about 800 DEG to about 850 DEG F. Operation at these conditions is essential to achieving the increased conversion and the increased yield of lower boiling liquid products. While the present invention has been described and illustrated by reference to particular embodiments thereof, it will be appreciated by those of ordinary skill in the art that the same lends itself to variations not necessarily illustrated herein. For this reason, then, references should be made solely to the appended claims for purposes of determining the true scope of the present invention.
Inventors
- 👤 Lonnie W. Vernon
- 👤 Fritz E. Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:26
CPC Classifications
C; C10; C10G; C10G47/00; C10G47/32; C10G47/34; C10G2300/00; C10G2300/10; C10G2300/107
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
150 words
A process for converting petroleum residuals comprising the steps of: (a) combining a petroleum residual with a solvent comprising materials selected from the group consisting of paraffinic, aromatic and hydroaromatic materials such that the ratio of paraffinic materials to aromatic and hydroaromatic materials is within the range from about 0:1 to about 0.5:1 and at least 0.8 weight percent donatable hydrogen in a concentration sufficient to provide at least 0.4 weight percent donatable hydrogen based on petroleum residual in the initial mixture; (b) converting the mixture from step (a) in the presence of molecular hydrogen at a hydrogen partial pressure within the range from about 1500 to about 2500 psig and at a temperature within the range from about 800° to about 850° F. for a nominal holding time within the range from about 30 to about 120 minutes; and (c) recovering a normally liquid product from the conversion step.
Claim 2
Dependent Claim
150 words
A process for converting petroleum residuals comprising the steps of: (a) combining a petroleum residual with a solvent comprising materials selected from the group consisting of paraffinic, aromatic and hydroaromatic materials such that the ratio of paraffinic materials to aromatic and hydroaromatic materials is within the range from about 0:1 to about 0.5:1 and at least 0.8 weight percent donatable hydrogen in a concentration sufficient to provide at least 0.4 weight percent donatable hydrogen based on petroleum residual in the initial mixture; (b) converting the mixture from step (a) in the presence of molecular hydrogen at a hydrogen partial pressure within the range from about 1500 to about 2500 psig and at a temperature within the range from about 800° to about 850° F. for a nominal holding time within the range from about 30 to about 120 minutes; and (c) recovering a normally liquid product from the conversion step.
Claim 3
Dependent Claim
26 words
The process of claim 1 wherein at least a portion of the solvent is a distillate fraction separated from the normally liquid product from the conversion.
Claim 4
Dependent Claim
26 words
The process of claim 1 wherein the ratio of paraffinic material to aromatic and hydroaromatic material is within the range from about 0:1 to about 0.25:1.
Claim 5
Dependent Claim
50 words
The process of claim 1 wherein the petroleum residual is a vacuum residual separated from a paraffinic crude and having an initial boiling point within the range from about 950° to about 1050° F. and wherein a hydrogenated creosote oil is used as at least a portion of the solvent.
Claim 6
Dependent Claim
33 words
The process of claim 1 wherein the petroleum residual is a vacuum residual having an initial boiling point within the range from about 950° to about 1050° F. separated from an aromatic crude.
Claim 7
Dependent Claim
66 words
The process of claim 5 wherein a distillate fraction having an initial boiling point within the range from about 400° to about 650° F. and a final boiling point within the range from about 850° to about 1050° F. is separated from the conversion product, hydrotreated to convert at least a portion of the aromatic components thereof to corresponding hydroaromatic components and used as the solvent.
Claim 8
Dependent Claim
14 words
The process of claim 6 wherein the separated fraction is the sole solvent used.
Claim 9
Dependent Claim
35 words
The process of claim 1 wherein the petroleum residual is a vacuum residual separated from a napthenic crude and a hydrogenated catalytic cracking recycle oil is used as at least a portion of the solvent.
Claim 10
Dependent Claim
50 words
The process of claim 1 wherein the petroleum residual is a vacuum residual separated from a napthenic crude and having an initial boiling point within the range from about 950° to about 1050° F. and wherein a hydrogenated creosote oil is used as at least a portion of the solvent.
Claim 11
Dependent Claim
35 words
The process of claim 1 wherein the petroleum residual is a vacuum residual separated from a paraffinic crude and a hydrogenated catalytic cracking recycle oil is used as at least a portion of the solvent.
Claim 12
Dependent Claim
150 words
A process for converting petroleum residuals comprising the steps of: (a) combining a petroleum residual with a solvent comprising materials selected from the group consisting of paraffinic, aromatic and hydroaromatic materials such that the ratio of paraffinic materials to aromatic and hydroaromatic materials is within the range from about 0:1 to about 0.25:1 and at least 1.0 weight percent donatable hydrogen in a concentration sufficient to provide at least 0.4 weight percent donatable hydrogen based on petroleum residual in the initial mixture; (b) converting the mixture from step (a) in the presence of molecular hydrogen at a hydrogen partial pressure within the range from about 1700 to about 2200 psig and at a temperature within the range from about 820° to about 845° F. for a nominal holding time within the range from about 30 to about 120 minutes; and (c) recovering a normally liquid product from the conversion step.
Claim 13
Dependent Claim
150 words
A process for converting petroleum residuals comprising the steps of: (a) combining a petroleum residual with a solvent comprising materials selected from the group consisting of paraffinic, aromatic and hydroaromatic materials such that the ratio of paraffinic materials to aromatic and hydroaromatic materials is within the range from about 0:1 to about 0.25:1 and at least 1.0 weight percent donatable hydrogen in a concentration sufficient to provide at least 0.4 weight percent donatable hydrogen based on petroleum residual in the initial mixture; (b) converting the mixture from step (a) in the presence of molecular hydrogen at a hydrogen partial pressure within the range from about 1700 to about 2200 psig and at a temperature within the range from about 820° to about 845° F. for a nominal holding time within the range from about 30 to about 120 minutes; and (c) recovering a normally liquid product from the conversion step.
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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) | 1987-02-27 | 1987-08-29 | 1988-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-27 | 1991-08-29 | 1992-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-27 | 1995-08-29 | 1996-02-28 | $7700.00 | Window Closed / Lapsed |