US3897329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spit flow hydrodesulfurization of petroleum fraction
Assignee: Texaco Inc
•
Filing: 1973-12-26
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Granted: 1975-07-29
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Expires: 1993-12-26
Abstract
Abstract Heavy hydrocarbon oils are desulfurized in a split flow catalytic process in which the upper catalyst bed temperature is at least 875*F. and the lower catalyst bed temperature is below 850*F.
Inventors
- 👤 William F Franz
- 👤 Howard V Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:03
CPC Classifications
C; C10; C10G; C10G65/00; C10G65/14; C10G65/16
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
145 words
A PROCESS FOR THE CONVERSION OF A RESIDUE-CONTAINING PETROLEUM FRACTION INTO LIGHTER PRODUCTS OF REDUCED SULFUR CONTENT IN WHICH THE HYDROGEN CONSUMPTION IS BETWEEN 100 AND 300 SCFB WHICH COMPRISES INTRODUCING SAID PETROLEUM FRACTION THROUGH A POINT OF ENTRY INTO A DESULFURIZATION REACTOR COMPRISING A FIRST HYDRODESULFURIZATION CATALYST ZONE BELOW AND A SECOND HYDRODESULFURIZATION CATALYST ZONE ABOVE SAID POINT OF ENTRY TO FLOW DOWNWARDLY THROUGH SAID FIRST CATALYST ZONE IN COUNTERCURRENT FLOW RELATIONSHIP TO HYDROGEN PASSING UPWARDLY THROUGH SAID FIRST CATALYTIC ZONE, PASSING SAID HYDROGEN UPWARDLY WITH VOLATILE HYDROCARBONS AND ENTRAINED LIQUIDS INTO AND THROUGH SAID SECOND CATALYST ZONE AND RECOVERING SAID PRODUCTS OF REDUCED SULFUR CONTENT FROM THE REACTION EFFLUENT OF SAAID FIRST AND SECOND CATALYST ZONES, THE TEMPERATURE IN SAID FIRST CATALYST ZONE BEING MAINTAINED BETWEEN 550* AND 850*F. AND THE TEMPERATURE IN SAID SECOND CATALYST ZONE BEING MAINTAINED BETWEEN 875* AND 1000*F.
Claim 2
Dependent Claim
145 words
A PROCESS FOR THE CONVERSION OF A RESIDUE-CONTAINING PETROLEUM FRACTION INTO LIGHTER PRODUCTS OF REDUCED SULFUR CONTENT IN WHICH THE HYDROGEN CONSUMPTION IS BETWEEN 100 AND 300 SCFB WHICH COMPRISES INTRODUCING SAID PETROLEUM FRACTION THROUGH A POINT OF ENTRY INTO A DESULFURIZATION REACTOR COMPRISING A FIRST HYDRODESULFURIZATION CATALYST ZONE BELOW AND A SECOND HYDRODESULFURIZATION CATALYST ZONE ABOVE SAID POINT OF ENTRY TO FLOW DOWNWARDLY THROUGH SAID FIRST CATALYST ZONE IN COUNTERCURRENT FLOW RELATIONSHIP TO HYDROGEN PASSING UPWARDLY THROUGH SAID FIRST CATALYTIC ZONE, PASSING SAID HYDROGEN UPWARDLY WITH VOLATILE HYDROCARBONS AND ENTRAINED LIQUIDS INTO AND THROUGH SAID SECOND CATALYST ZONE AND RECOVERING SAID PRODUCTS OF REDUCED SULFUR CONTENT FROM THE REACTION EFFLUENT OF SAAID FIRST AND SECOND CATALYST ZONES, THE TEMPERATURE IN SAID FIRST CATALYST ZONE BEING MAINTAINED BETWEEN 550* AND 850*F. AND THE TEMPERATURE IN SAID SECOND CATALYST ZONE BEING MAINTAINED BETWEEN 875* AND 1000*F.
Claim 3
Dependent Claim
19 words
The process of claim 1 in which the temperature of the first catalyst zone is between 700* and 850*F.
Claim 4
Dependent Claim
16 words
The process of claim 1 in which said hydrogen consumption is between 150 and 220 scfb.
Claim 5
Dependent Claim
27 words
The process of claim 1 in which hydrogen is introduced into said desulfurization reactor with said residue-containing petroleum fraction at a rate between 500 and 5,000 scfb.
Claim 6
Dependent Claim
24 words
The process of claim 1 in which said hydrogen is introduced into said first catalytic zone at a rate of at least 3,000 scfb.
Claim 7
Dependent Claim
27 words
The process of claim 5 in which hydrogen is introduced into said desulfurization reactor with said residue-containing petroleum fraction at a rate between 500 and 5000 scfb.
Claim 8
Dependent Claim
19 words
The process of claim 5 in which said hydrogen is introduced at a rate between 8,000 and 15,000 scfb.
Claim 9
Dependent Claim
16 words
The process of claim 1 in which said residue-containing petroleum fraction is a vacuum gas oil.
Claim 10
Dependent Claim
15 words
The process of claim 1 in which said residue-containing petroleum fraction is an atmospheric residuum.
Claim 11
Dependent Claim
15 words
The process of claim 1 in which said residue-containing petroleum fraction is a vacuum residuum.
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) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |