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US4172026A
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Method for lowering the pour point of shale oil, and the resulting shale oil composition
Assignee: Chevron USA Inc
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Filing: 1978-03-29
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Granted: 1979-10-23
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Expires: 1998-03-29
Abstract
Abstract The pour point of a high-pour-point shale oil is lowered by mixing it with a low-pour-point whole shale oil. Both the method and the resulting composition are claimed.
Inventors
- 👤 Harbo P. Jensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:26
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/002; C10G31/00; C10G31/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
137 words
An improved low-pour-point shale oil composition comprising in admixture, a first shale oil having a pour point above 20° F. (-7° C.) and a second, whole, shale oil having a pour point below 20° F. (-7° C.), said second shale oil being produced by thermally treating a raw whole shale oil feedstock having a pour point in excess of 20° F. (-7° C.) in a treating zone at conditions including a temperature from 600° F. (316° C.) to below the point of significant thermal decomposition of said feedstock, a pressure sufficient to maintain said feedstock substantially in liquid phase and a time from 0.02 to 5 hours, said second shale oil being present in said composition in an amount sufficient to provide said composition with a pour point significantly lower than that of said first shale oil.
Claim 2
Dependent Claim
137 words
An improved low-pour-point shale oil composition comprising in admixture, a first shale oil having a pour point above 20° F. (-7° C.) and a second, whole, shale oil having a pour point below 20° F. (-7° C.), said second shale oil being produced by thermally treating a raw whole shale oil feedstock having a pour point in excess of 20° F. (-7° C.) in a treating zone at conditions including a temperature from 600° F. (316° C.) to below the point of significant thermal decomposition of said feedstock, a pressure sufficient to maintain said feedstock substantially in liquid phase and a time from 0.02 to 5 hours, said second shale oil being present in said composition in an amount sufficient to provide said composition with a pour point significantly lower than that of said first shale oil.
Claim 3
Dependent Claim
24 words
The composition of claim 1 wherein pour point thereof is at least 20° F. (11° C.) lower than that of said first shale oil.
Claim 4
Dependent Claim
42 words
The composition of claim 1 wherein said amount of the second shale oil is from 10 to 90 weight percent of the composition, and the first shale oil is present in an amount from 90 to 10 weight percent of the composition.
Claim 5
Independent Claim
146 words
A method for lowering the pour point of a first shale oil having a pour point above 20° F. (-70° C.), which comprises forming a mixture of said first shale oil and a second, whole, shale oil having a pour point below 20° F. (-7° C.), said second shale oil being produced by thermally treating a raw whole shale oil feedstock having a pour point in excess of 20° F. (-7° C.) in a treating zone at conditions including a temperature from 600° F. (316° C.) to below the point of significant thermal decomposition of said feedstock, a pressure sufficient to maintain said feedstock substantially in liquid phase and a time from 0.02 to 5 hours, said second shale oil being present in said mixture in an amount sufficient to provide the mixture with a pour point significantly lower than that of said first shale oil.
Claim 6
Independent Claim
146 words
A method for lowering the pour point of a first shale oil having a pour point above 20° F. (-70° C.), which comprises forming a mixture of said first shale oil and a second, whole, shale oil having a pour point below 20° F. (-7° C.), said second shale oil being produced by thermally treating a raw whole shale oil feedstock having a pour point in excess of 20° F. (-7° C.) in a treating zone at conditions including a temperature from 600° F. (316° C.) to below the point of significant thermal decomposition of said feedstock, a pressure sufficient to maintain said feedstock substantially in liquid phase and a time from 0.02 to 5 hours, said second shale oil being present in said mixture in an amount sufficient to provide the mixture with a pour point significantly lower than that of said first shale oil.
Claim 7
Dependent Claim
26 words
The method of claim 4 wherein said mixture has a pour point at least 20° F. (11° C.) lower than that of the first shale oil.
Claim 8
Dependent Claim
42 words
The method of claim 4 wherein said amount of the second shale oil is from 10 to 90 weight percent of the mixture, and said first shale oil is present in an amount from 90 to 10 weight percent of the mixture.
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) | 1982-10-22 | 1983-04-23 | 1983-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-22 | 1987-04-23 | 1987-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-22 | 1991-04-23 | 1991-10-23 | $7700.00 | Window Closed / Lapsed |