US4082652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improved carbon-supported hydrodesulfurization catalysts
Assignee: Wyeth Holdings LLC
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Filing: 1976-01-15
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Granted: 1978-04-04
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Expires: 1996-01-15
Abstract
Abstract An improved carbon-supported hydrodesulfurization catalyst is obtained when the support first has deposited thereon a molybdenum compound convertible to MoS 2 , said molybdenum compound is converted to MoS 2 , and subsequently additional molybdenum compound, if necessary, and a metal compound selected from nickel and cobalt compounds are deposited thereon.
Inventors
- 👤 John Davidson Voorhies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:18
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/882; B01J27/00; B01J27/02; B01J27/04; B01J27/047; B01J27/051; B01J27/0515; B01J37/00; B01J37/20; C; C10; C10G; C10G45/00; C10G45/02; C10G45/04; C10G45/06; C10G45/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
175 words
A process for preparing an improved hydrodesulfurization catalyst for petroleum fractions which comprises: (1) depositing upon a carbon support sufficient of a molybdenum compound capable of being converted to MoS 2 to provide a support after said conversion containing from about 5 to about 25 weight percent MoS 2 , based on the weight of said support; (2) treating the support obtained from step (1) to convert said molybdenum compound to MoS 2 ; (3) depositing upon the support obtained from step (2) in at least one step sufficient of a molybdenum compound capable of being converted to MoS 2 to increase the content of MoS 2 on said support after said conversion to a total of about 10 to about 25 weight percent, based on the weight of said support, and sufficient of a metal compound selected from the group consisting of nickel and cobalt compounds capable of being converted to corresponding metal sulfide to provide from about 0.4 to 8.0 weight percent of said metal compound, based on the weight of said support.
Claim 2
Dependent Claim
175 words
A process for preparing an improved hydrodesulfurization catalyst for petroleum fractions which comprises: (1) depositing upon a carbon support sufficient of a molybdenum compound capable of being converted to MoS 2 to provide a support after said conversion containing from about 5 to about 25 weight percent MoS 2 , based on the weight of said support; (2) treating the support obtained from step (1) to convert said molybdenum compound to MoS 2 ; (3) depositing upon the support obtained from step (2) in at least one step sufficient of a molybdenum compound capable of being converted to MoS 2 to increase the content of MoS 2 on said support after said conversion to a total of about 10 to about 25 weight percent, based on the weight of said support, and sufficient of a metal compound selected from the group consisting of nickel and cobalt compounds capable of being converted to corresponding metal sulfide to provide from about 0.4 to 8.0 weight percent of said metal compound, based on the weight of said support.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the amount of MoS 2 in said catalyst is about 12-16 weight percent.
Claim 4
Dependent Claim
21 words
The process of claim 1 wherein the amount of metal compound in said catalyst is about 0.9 to 5.0 weight percent.
Claim 5
Dependent Claim
12 words
The process of claim 1 wherein said metal compound is nickelous formate.
Claim 6
Dependent Claim
12 words
The process of claim 1 wherein said metal compound is nickelous acetate.
Claim 7
Dependent Claim
12 words
The process of claim 1 wherein said metal compound is cobaltous acetate.
Claim 8
Dependent Claim
24 words
The process of claim 1 wherein step (1) is carried out using a solution of MoO 3 is aqueous (NH 4 ) 2 S.
Claim 9
Dependent Claim
28 words
The process of claim 7 wherein step (2) is carried out by heating said support at a temperature in the range of 300°-450° C in an inert atmosphere.
Claim 10
Dependent Claim
20 words
The process of claim 8 wherein step (2) is carried out at a temperature in the range of 400°-450° F.
Claim 11
Dependent Claim
34 words
A process for the hydrodesulfurization of a petroleum fraction which comprises contacting said petroleum fraction with hydrogen at hydrodesulfurization and conditions in the presence of a catalyst prepared by the process of claim 1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |