US3920581A
Expired / Lapsed
US
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Method of preparing a hydrodesulfurization catalyst
Assignee: Universal Oil Products Co
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Filing: 1973-05-18
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Granted: 1975-11-18
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Expires: 1993-05-18
Abstract
Abstract A catalytic composite comprising a Group VIB and a Group VIII metal composited with an alumina support or carrier material. A catalytic composite particularly useful as a hydrodesulfurization catalyst results from the method of preparation. Basic aluminum sulfate and a Group VIII metal compound are dissolved in an aluminum chloride hydrosol followed by a mixture of a Group VIB metal compound and an aqueous urea-hexamethylenetetramine solution. The resulting hydrosol is formed into spheroidal gel particles by the oil drop method.
Inventors
- 👤 Lee Hilfman
- 👤 Edward Michalko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:38
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/02; B01J21/04; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J35/00; B01J35/50; B01J35/51; C; C10; C10G; C10G45/00; C10G45/02; C10G45/04; C10G45/06; C10G45/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
172 words
A METHOD OF PREPARING A CATALYTIC COMPOSITE OF FROM ABOUT 5 TO 20 WT.% GROUP VIB METAL IN OXIDE FORM AND FROM ABOUT 0.1 TO ABOUT 10 WT. % GROUP VII METAL IN OXIDE FORM COMPOSITED WITH AN ALUMINA CARRIER MATERIAL, COMPRISING: A. COMMINGLING ALUMINUN SULFATE AND AMMONIUM HYDROXIDE IN AQUEOUS SOLUTION AT A PH OF FROM ABOUT 5.5 TO ABOUT 6.5 PRECIPITATING A BASIC ALUMINUM SULFATE; B. DISSOLVING SAID BASIC ALUMINUM SULFATE AND A SOLUBLE GROUP VII METAL COMPOUND THERMALLY DECOMPOSABLE TO METAL OXIDE IN AN ALUMINUM CHLORIDE HYDROSOL HAVING AN ALUMINUM/CHLORIDE WEIGHT RATIO OF FROM ABOUT 0.9:1 ABOUT 1.4:1; C. ADMIXING MOLYBDENUM TRIOXIDE OR A SOLUBLE GROUP VIB METAL COMPOUND THERMALLY DECOMPOSABLE TO METAL OXIDE WITH AN AQUEOUS SOLUTION OF UREA AND HEXAMETHYLENETETRAMINE, AND DISSOLVING THE MIXTURE IN THE HYDROSOL; D. ADMIXING MOLYBDENUM TRIOXIDE OR A SOLUBLE GROUP VIB ING GELATION OF HYDROSOL; E. AGING THE RESULTING HYDROSOL SPHERES AT A TEMPERATURE EFFECTING DECOMPOSITION OF THE RESIDUAL UREA AND HEXAMETHYLENETETRAMINE CONTAINED THEREIN. AND WASHING DRYING AND CLACINING THE AGED SPHERES.
Claim 2
Independent Claim
172 words
A METHOD OF PREPARING A CATALYTIC COMPOSITE OF FROM ABOUT 5 TO 20 WT.% GROUP VIB METAL IN OXIDE FORM AND FROM ABOUT 0.1 TO ABOUT 10 WT. % GROUP VII METAL IN OXIDE FORM COMPOSITED WITH AN ALUMINA CARRIER MATERIAL, COMPRISING: A. COMMINGLING ALUMINUN SULFATE AND AMMONIUM HYDROXIDE IN AQUEOUS SOLUTION AT A PH OF FROM ABOUT 5.5 TO ABOUT 6.5 PRECIPITATING A BASIC ALUMINUM SULFATE; B. DISSOLVING SAID BASIC ALUMINUM SULFATE AND A SOLUBLE GROUP VII METAL COMPOUND THERMALLY DECOMPOSABLE TO METAL OXIDE IN AN ALUMINUM CHLORIDE HYDROSOL HAVING AN ALUMINUM/CHLORIDE WEIGHT RATIO OF FROM ABOUT 0.9:1 ABOUT 1.4:1; C. ADMIXING MOLYBDENUM TRIOXIDE OR A SOLUBLE GROUP VIB METAL COMPOUND THERMALLY DECOMPOSABLE TO METAL OXIDE WITH AN AQUEOUS SOLUTION OF UREA AND HEXAMETHYLENETETRAMINE, AND DISSOLVING THE MIXTURE IN THE HYDROSOL; D. ADMIXING MOLYBDENUM TRIOXIDE OR A SOLUBLE GROUP VIB ING GELATION OF HYDROSOL; E. AGING THE RESULTING HYDROSOL SPHERES AT A TEMPERATURE EFFECTING DECOMPOSITION OF THE RESIDUAL UREA AND HEXAMETHYLENETETRAMINE CONTAINED THEREIN. AND WASHING DRYING AND CLACINING THE AGED SPHERES.
Claim 3
Dependent Claim
42 words
The method of claim 1 further characterized with respect to step (b) in that said basic aluminum sulfate is utilized in an amount to provide from about 25 to about 75 wt. % of the alUmina component of the final catalytic composite.
Claim 4
Dependent Claim
24 words
The method of claim 1 further characterized with respect to step (b) in that said Group VIII metal compound is a compound of cobalt.
Claim 5
Dependent Claim
23 words
The method of claim 1 further characterized with respect to step (b) in that said Group VIII metal compound is cobalt nitrate hexahydrate.
Claim 6
Dependent Claim
24 words
The method of claim 1 further characterized with respect to step (c) in that said Group VIB metal compound is a compound of molybdenum.
Claim 7
Dependent Claim
21 words
The method of claim 1 further characterized with respect to step (c) in that molybdenum trioxide is admixed in said step.
Claim 8
Dependent Claim
59 words
The method of claim 1 further characterized with respect to step (c) in that said urea and hexamethylenetetramine are employed in a mole ratio of from about 1:1 to about 5:1 and in a total amount to effect from about 110 to about 200% neutralization of the chloride and sulfate acid anion content of the hydrosol upon total decomposition.
Claim 9
Dependent Claim
18 words
The method of claim 6 further characterized in that said Group VIII metal compound is a cobalt compound.
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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |