Patent US3948763A successfully refreshed from Google Patents.
US3948763A
Expired / Lapsed
US
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Sulfiding process for desulfurization catalysts
Assignee: Gulf Research and Development Co
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Filing: 1974-03-25
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Granted: 1976-04-06
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Expires: 1994-03-25
Abstract
Abstract An improved method for sulfiding a petroleum distillate desulfurization catalyst which comprises sulfiding the catalyst composite with a sulfur-containing petroleum distillate at a temperature in excess of 660 DEG F. and thereafter conducting the desulfurization process at a temperature less than 650 DEG F.
Inventors
- 👤 Robert D. Christman
- 👤 Kirk J. Metzger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:54
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/02; C10G45/04; C10G45/06; C10G45/08; B; B01; B01J; B01J27/00; B01J27/02; B01J27/04; B01J37/00; B01J37/20; C10G29/00; C10G29/06; C10G29/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
125 words
In a process which comprises hydrodesulfurizing a petroleum distillate feed containing from 0.2 to 2.0 weight percent sulfur and having a 90% distillation condensation point of less than 625°F. at a temperature in the range of 550° to 640°F. and in the presence of a catalyst comprising from 0.1 to 5 weight percent cobalt, from 0.1 to 5 weight percent nickel, from 5.0 to 15 weight percent molybdenum, and alumina; the improvement which consists essentially of initially contacting said catalyst with said sulfur-containing petroleum distillate feed under sulfiding conditions of at least 660°F. for a period in the range of 4 to 48 hours, and thereafter contacting said catalyst with said feed under hydrodesulfurization conditions at a temperature in the range of 550° to 640°F.
Claim 2
Dependent Claim
125 words
In a process which comprises hydrodesulfurizing a petroleum distillate feed containing from 0.2 to 2.0 weight percent sulfur and having a 90% distillation condensation point of less than 625°F. at a temperature in the range of 550° to 640°F. and in the presence of a catalyst comprising from 0.1 to 5 weight percent cobalt, from 0.1 to 5 weight percent nickel, from 5.0 to 15 weight percent molybdenum, and alumina; the improvement which consists essentially of initially contacting said catalyst with said sulfur-containing petroleum distillate feed under sulfiding conditions of at least 660°F. for a period in the range of 4 to 48 hours, and thereafter contacting said catalyst with said feed under hydrodesulfurization conditions at a temperature in the range of 550° to 640°F.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the 10% distillation condensation point of said petroleum distillate feed is above 400°F.
Claim 4
Dependent Claim
29 words
The process of claim 1 wherein said distillate feed is kerosene and the concentration of sulfur in said kerosene is in the range of 0.5 to 1.5 weight percent.
Claim 5
Dependent Claim
32 words
The process of claim 1 wherein said catalyst comprises from 0.1 to 5 weight percent cobalt, from 0.1 to 5 weight percent nickel, from 5.0 to 15 weight percent molybdenum, and 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) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |