US3775293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Desulfurization of asphaltene-containing hydrocarbonaceous black oils
Assignee: Universal Oil Products Co
•
Filing: 1972-08-09
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Granted: 1973-11-27
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Expires: 1992-08-09
Abstract
Abstract Sulfurous, asphaltene-containing black oils are converted into desulfurized, lower-boiling hydrocarbon products. The process involves a combination of solvent deasphalting, thermal cracking and multiple-stage hydrocracking.
Inventors
- 👤 C Watkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:45
CPC Classifications
C; C10; C10G; C10G69/00; C10G69/02; C10G69/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
57 words
The process of claim 1 further characterized in that said first reaction zone effluent is separated, in a first separation zone, at substantially the same temperature and pressure, to provide a first principally vaporous phase and a third liquid phase, and reacting at least a portion of said third liquid phase in said non-catalytic second reaction zone.
Claim 2
Dependent Claim
27 words
The process of claim 2 further characterized in that at least a portion of said first vaporous phase is reacted with hydrogen in said third reaction zone.
Claim 3
Dependent Claim
53 words
The process of claim 1 further characterized in that said second reaction zone effluent is separated, in a second separation zone, at substantially the same temperature and at a reduced pressure in the range of from subatmospheric to about 200 psig., to provide a second principally vaporous phase and a heavy resin product.
Claim 4
Dependent Claim
27 words
The process of claim 4 further characterized in that at least a portion of said second vaporous phase is reacted with hydrogen in said third reaction zone.
Claim 5
Dependent Claim
52 words
The process of claim 1 further characterized in that said third reaction zone effluent is separated, in a third separation zone, at substantially the same pressure and at a temperature in the range of about 60*F. to about 140*F., to provide a fourth liquid phase and a hydrogen-rich third principally vaporous phase.
Claim 6
Dependent Claim
25 words
The process of claim 6 further characterized in that at least a portion of said third vaporous phase is recycled to said first reaction zone.
Claim 7
Dependent Claim
25 words
The process of claim 6 further characterized in that at least a portion of said fourth liquid phase is recycled to said third reaction zone.
Claim 8
Dependent Claim
28 words
The process of claim 1 further characterized in that the extraction conditions in said second extraction zone include a higher temperature than that in said first extraction zone.
Claim 9
Dependent Claim
28 words
The process of claim 1 further characterized in that said portion of the resulting first reaction zone effluent is reacted with hydrogen in said non-catalytic second reaction zone.
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |