Patent US3853791A successfully refreshed from Google Patents.
US3853791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxide and molybdenum oxide on an alumina support and catalyst obtained
Assignee: Wyeth Holdings LLC
•
Filing: 1973-02-06
•
Granted: 1974-12-10
•
Expires: 1993-02-06
Abstract
Abstract A process for an improved hydrodesulfurization catalyst comprising treating a calcined formed alumina support with a stabilized solution of a cobalt source, a molybdenum source and urea and then drying and activating the treated support to provide a composite of improved activity.
Inventors
- 👤 I Feins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:07
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/882; C; C10; C10G; C10G45/00; C10G45/02; C10G45/04; C10G45/06; C10G45/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
127 words
A PROCESS FOR PREPARING A HYDRODESULFURIZATION CATALYST WHICH COMPRISES: PREPARING A CALCINED FORMED ALUMINA SUPPORT; TREATING SAID SUPPORT SO AS TO FURNISH THEREON AN AQUEOUS SOLUTION OF (A) A COBALT COMPOUND, (B) A MOLYBDENUM COMPOUND, AND (C) UREA IN AN AMOUNT AT LEAST 0.5 MOLAR WITH RESPECT TO THE MOLAR QUANTITY OF COBALT FURNISHED, SAID COMPOUNDS UPON SUBSEQUENT ACTIVATION PROVIDING THE CORRESPONDING METAL OXIDES, SAID FURNISH PROVIDING AN AQUEOUS SOLUTION STABLE WITH RESPECT TO PRECIPITATION; DEHYDRATING THE THUSTREATED SUPPORT; AND ACTIVATING THE DEHYDRATED SUPPORT SO AS TO PROVIDE A COMPOSITE CONTAINING FROM ABOUT 1 PERCENT TO 8 PERCENT COBALT AND FROM ABOUT 8 PERCENT TO 20 PERCENT MOLYBDENUM, SAID PERCENTAGES BEING BY WEIGHT BASED ON THE WEIGHT OF THE ACTIVATED COMPOSITE AND EXPRESSED AS THE METAL OXIDES.
Claim 2
Dependent Claim
127 words
A PROCESS FOR PREPARING A HYDRODESULFURIZATION CATALYST WHICH COMPRISES: PREPARING A CALCINED FORMED ALUMINA SUPPORT; TREATING SAID SUPPORT SO AS TO FURNISH THEREON AN AQUEOUS SOLUTION OF (A) A COBALT COMPOUND, (B) A MOLYBDENUM COMPOUND, AND (C) UREA IN AN AMOUNT AT LEAST 0.5 MOLAR WITH RESPECT TO THE MOLAR QUANTITY OF COBALT FURNISHED, SAID COMPOUNDS UPON SUBSEQUENT ACTIVATION PROVIDING THE CORRESPONDING METAL OXIDES, SAID FURNISH PROVIDING AN AQUEOUS SOLUTION STABLE WITH RESPECT TO PRECIPITATION; DEHYDRATING THE THUSTREATED SUPPORT; AND ACTIVATING THE DEHYDRATED SUPPORT SO AS TO PROVIDE A COMPOSITE CONTAINING FROM ABOUT 1 PERCENT TO 8 PERCENT COBALT AND FROM ABOUT 8 PERCENT TO 20 PERCENT MOLYBDENUM, SAID PERCENTAGES BEING BY WEIGHT BASED ON THE WEIGHT OF THE ACTIVATED COMPOSITE AND EXPRESSED AS THE METAL OXIDES.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the cobalt source and the molybdenum are furnished in a single aqueous solution.
Claim 4
Dependent Claim
20 words
The process of claim 1 wherein the cobalt source, molybdenum source, and urea are furnished in a single aqueous solution.
Claim 5
Dependent Claim
16 words
The process of claim 1 wherein said furnish also provides sufficient acid to stabilize said solution.
Claim 6
Dependent Claim
11 words
The process of claim 4 wherein said acid is phosphoric acid.
Claim 7
Dependent Claim
26 words
The process of claim 1 wherein said urea is furnished in an amount which is 2 molar with respect to the molar quantity of cobalt furnished.
Claim 8
Dependent Claim
12 words
The process of claim 1 wherein said cobalt source is cobalt nitrate.
Claim 9
Dependent Claim
13 words
The process of claim 1 wherein said molybdenum source is an ammonium molybdate.
Claim 10
Dependent Claim
12 words
The process of claim 8 wherein said ammonium molybdate is ammonium dimolybdate.
Claim 11
Dependent Claim
10 words
A hydrodesulfurization catalyst prepared by the process of claim 1.
References Cited (Backward Citations)
US2393288A
Cited
US2913422A
Cited
US2983691A
Cited
US2980632A
Cited
US3267025A
Cited
US3232887A
Cited
US3403111A
Cited
GB1220105A
Cited
US3471399A
Cited
US3751380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |