US3859199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrodesulfurization of asphaltene-containing black oil
Assignee: Universal Oil Products Co
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Filing: 1973-07-05
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Granted: 1975-01-07
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Expires: 1993-07-05
Abstract
Abstract A combination process for the desulfurization of asphaltenecontaining black oils. The charge stock in admixture with hydrogen and a recycle stream containing a high percentage of asphaltenes is subjected to a first-stage catalytic desulfurization zone. The effluent from the first stage is deasphalted to produce a deasphalted oil stream and a residuum stream. The deasphalted oil stream in admixture with hydrogen is subjected to a second-stage catalytic desulfurization zone and at least a portion of the residuum stream is recycled to the first stage catalytic desulfurization zone.
Inventors
- 👤 John G Gatsis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:35
CPC Classifications
C; C10; C10G; C10G67/00; C10G67/02; C10G67/04; C10G67/0454; C10G67/0463
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
140 words
A COMBINATION PROCESS FOR THE DESULFURIZATION OF A SULFUROUS, ASPHALTENE-CONTAINING HYDROCARBONACEOUS CHARGE STOCK, OF WHICH AT LEAST ABOUT 10 PERCENT BOILS ABOVE A TEMPERATURE OF 1,050*F., WHICH PROCESS COMPRISES THE STEPS OF: A. CONTACTING A MIXTURE OF SAID CHARGE STOCK, HYDROGEN AND AT LEAST A PORTION OF THE ASPHALTIC RESIDUUM RESULTING FROM STEP (C) IN A FIRST CATALYTIC DESULFURIZAION REACTION ZONE TO PARTIALLY CONVERT THE ASPHALTENES PRESENT IN SAID CHARGE STOCK; B. DEASPHALTING AT LEAST A PORTION OF THE RESULTING DESULFURIZED PRODUCT EFFLUENT IN A DEASPHALTING ZONE TO PROVIDE A DEASPHALTED OIL, ESSENTIALLY FREE OF ASPHALTENES; AND AN ASPHALTIC RESIDUUM CONTAINING ASPHALTENES; C. RECYCLING AT LEAST A PORTION OF SAID ASPHALTIC RESIDUUM IN ADMIXTURE WITH SAID CHARGE STOCK; D. CONTACTING SAID DEASPHALTED OIL AND HYDROGEN IN A SECOND CATALYTIC DESULFURIZATION REACTION ZONE; AND, E. RECOVERING A LOW SULFUR HYDROCARBONACEOUS OIL.
Claim 2
Dependent Claim
140 words
A COMBINATION PROCESS FOR THE DESULFURIZATION OF A SULFUROUS, ASPHALTENE-CONTAINING HYDROCARBONACEOUS CHARGE STOCK, OF WHICH AT LEAST ABOUT 10 PERCENT BOILS ABOVE A TEMPERATURE OF 1,050*F., WHICH PROCESS COMPRISES THE STEPS OF: A. CONTACTING A MIXTURE OF SAID CHARGE STOCK, HYDROGEN AND AT LEAST A PORTION OF THE ASPHALTIC RESIDUUM RESULTING FROM STEP (C) IN A FIRST CATALYTIC DESULFURIZAION REACTION ZONE TO PARTIALLY CONVERT THE ASPHALTENES PRESENT IN SAID CHARGE STOCK; B. DEASPHALTING AT LEAST A PORTION OF THE RESULTING DESULFURIZED PRODUCT EFFLUENT IN A DEASPHALTING ZONE TO PROVIDE A DEASPHALTED OIL, ESSENTIALLY FREE OF ASPHALTENES; AND AN ASPHALTIC RESIDUUM CONTAINING ASPHALTENES; C. RECYCLING AT LEAST A PORTION OF SAID ASPHALTIC RESIDUUM IN ADMIXTURE WITH SAID CHARGE STOCK; D. CONTACTING SAID DEASPHALTED OIL AND HYDROGEN IN A SECOND CATALYTIC DESULFURIZATION REACTION ZONE; AND, E. RECOVERING A LOW SULFUR HYDROCARBONACEOUS OIL.
Claim 3
Dependent Claim
25 words
The process of claim 1 further characterized in that said hydrogen is present in an amount of from about 1,500 to about 10, 000 s.c.f./bbl.
Claim 4
Dependent Claim
28 words
The process of claim 1 further characterized in that said charge stock contacts said catalyst at a liquid hourly space velocity of from about 0.1 to about 10.
Claim 5
Dependent Claim
24 words
The process of claim 1 further characterized in that said catalytic reaction zones are maintained at a temperature from about 600* to about 900*F.
Claim 6
Dependent Claim
25 words
The process of claim 1 further characterized in that said catalytic reaction zones are maintained at a pressure frOm about 1,000 to about 4,000 psig.
Claim 7
Dependent Claim
23 words
The process of claim 1 further characterized in that said deasphalting zone utilizes a solvent selected from propane and butane and mixtures thereof.
Claim 8
Dependent Claim
31 words
The process of claim 1 further characterized in that said catalytic desulfurization zones contain catalyst comprising at least one metal selected from Group VI-B and Group VIII of the Periodic Table.
Claim 9
Dependent Claim
19 words
The process of claim 1 further characterized in that said catalytic desulfurization zones contain catalyst comprising cobalt and molybdenum.
References Cited (Backward Citations)
US3748261A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |