US3915848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrodesulfurization of heavy petroleum oil at higher temperatures and space velocities
Assignee: Texaco Inc
•
Filing: 1973-12-07
•
Granted: 1975-10-28
•
Expires: 1993-12-07
Abstract
Abstract Heavy hydrocarbon oils are desulfurized at high temperature and high space velocity in the presence of a catalyst comprising a Group VIII metal and a Group VI metal or their compounds and also containing as an agent for reducing the deactivation rate of the catalyst, a small amount of a Group VII metal or compound thereof.
Inventors
- 👤 Stanley Kravitz
- 👤 Jitendra A Patel
- 👤 Jr William B Mather
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:23
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/889; B01J23/8898; B01J23/85; C; C10; C10G; C10G45/00; C10G45/02; C10G45/04; C10G45/06; C10G45/08; C10G45/10; B01J21/00; B01J21/12; B01J23/88; B01J23/882; B01J35/00; B01J35/60; B01J35/61; B01J35/615; B01J35/63; B01J35/635; B01J35/64; B01J35/647
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
122 words
A PROCESS FOR THE HYDRODESULFURIZATION OF A PETROLEUM OIL FRACTION HAVING AN INITIAL BOILING POINT OF AT LEAST ABOUT 500*F, WHICH COMPRISES CONTACTING SAID FRACTION IN THE PRESENCE OF ADDED HYDROGEN UNDER HYDRODESULFURIZATION CONDITIONS WITH A CATALYST COMPRISING AN IRON GROUP METAL, OXIDE OR SULFIDE THEREOF AND A GROUP VI METAL, OXIDE OR SULFIDE THEREOF ON A REFRACTORY INORGANIC OXIDE SUPPORT SELECTED FROM THE GROUP CONSISTING OF ALUMINA, MAGNESIA AND ZIRCONIA AND MIXTURES THEREOF AND CONTAINING BETWEEN 0 AND 5 WT. % SILICA, SAID CATALYST ALSO CONTAINING FROM 0.1-5% BY WEIGHT BASED ON THE CATALYST COMPOSITE OF A GROUP V11 METAL OR OXIDE THEREOF AT A TEMPERATURE BETWEEN ABOUT 800* AND 850*F AND A SPACE VELOCITY BETWEEN ABOUT 4 AND 8 V/V/HR.
Claim 2
Dependent Claim
122 words
A PROCESS FOR THE HYDRODESULFURIZATION OF A PETROLEUM OIL FRACTION HAVING AN INITIAL BOILING POINT OF AT LEAST ABOUT 500*F, WHICH COMPRISES CONTACTING SAID FRACTION IN THE PRESENCE OF ADDED HYDROGEN UNDER HYDRODESULFURIZATION CONDITIONS WITH A CATALYST COMPRISING AN IRON GROUP METAL, OXIDE OR SULFIDE THEREOF AND A GROUP VI METAL, OXIDE OR SULFIDE THEREOF ON A REFRACTORY INORGANIC OXIDE SUPPORT SELECTED FROM THE GROUP CONSISTING OF ALUMINA, MAGNESIA AND ZIRCONIA AND MIXTURES THEREOF AND CONTAINING BETWEEN 0 AND 5 WT. % SILICA, SAID CATALYST ALSO CONTAINING FROM 0.1-5% BY WEIGHT BASED ON THE CATALYST COMPOSITE OF A GROUP V11 METAL OR OXIDE THEREOF AT A TEMPERATURE BETWEEN ABOUT 800* AND 850*F AND A SPACE VELOCITY BETWEEN ABOUT 4 AND 8 V/V/HR.
Claim 3
Dependent Claim
14 words
The process of claim 1 in which the hydrodesulfurization pressure is below 500 psig.
Claim 4
Dependent Claim
13 words
The process of claim 1 in which the Group VIII metal is nickel.
Claim 5
Dependent Claim
13 words
The process of claim 1 in which the Group VIII metal is cobalt.
Claim 6
Dependent Claim
13 words
The process of claim 1 in which the Group VI metal is molybdenum.
Claim 7
Dependent Claim
13 words
The process of claim 1 in which the Group VI metal is tungsten.
Claim 8
Dependent Claim
13 words
The process of claim 1 in which the Group VII metal is rhenium.
Claim 9
Dependent Claim
13 words
The process of claim 1 in which the Group VII metal is manganese.
Claim 10
Dependent Claim
20 words
The process of claim 1 in which the petroleum oil fraction has an initial boiling point of at least 625*F.
Claim 11
Dependent Claim
22 words
The process of claim 1 in which the Group VII metal is present in an amount between 0.2 and 2.0 wt. %.
Claim 12
Dependent Claim
17 words
The process of claim 1 in which the hydrodesulfurization pressure is above 300 and below 500 psig.
Claim 13
Dependent Claim
11 words
The process of claim 1 in which the support comprises alumina.
Claim 14
Dependent Claim
28 words
The process of claim 1 in which the catalyst support is composed of silica in an amount up to about 5 wt. % and the balance is alumina.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |