Patent US3177160A successfully refreshed from Google Patents.
US3177160A
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Preparation of hydrodesulfurization catalyst
Assignee: Universal Oil Products Co
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Filing: 1962-01-25
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Granted: 1965-04-06
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Expires: 1982-01-25
Abstract
No abstract record available.
Inventors
- 👤 Rosset Armand J De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:57
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/38; B01J23/54; B01J23/56; B01J23/64; B01J23/652; B01J23/88; B01J23/883
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A METHOD OF PREPARING A HYDRODESULFURIZATION CATALYST WHICH COMPRISES INITIALLY PRECIPITATING BASIC ALUMINUM SULFATE FROM A SOLUTION OF ALUMINUM SULFATE, HYDROLYZING THE PRECIPITATE, WHILE MAINTAINING THE RESULTING SLURRY AT A PH LESS THAN ABOUT 7.0, WITH A CHLORINE-CONTAINING COMPOUND IN AN AMOUNT TO FORM A SLURRY HAVING A FORMULA WEIGHT RATIO OF ALUMINA-EQUIVALENT TO CHLORIDE ION WITHIN THE RANGE OF FROM ABOUT 3:1 TO ABOUT 50:1, WASHING THE RESULTING HYDROLYZED PRECIPITATE UNTIL THE WASHED PREPITATE CONTAINS LESS THAN ABOUT 2.0 PERCENT BY WEIGHT OF SULFATE, DRYING AND CALCINING TO PRODUCE ALUMINA, COMBINING AT LEAST ONE METALLIC COMPONENT SELECTED FROM THE GROUP CONSISTING OF THE METALS OF GROUPS VI-A AND VIII OF THE PERIODIC TABLE WITH THE CALCINED ALUMINA AND THEREAFTER DRYING AND CALCING THE RESULTING COMPOSITE.
Claim 2
Independent Claim
126 words
A METHOD OF PREPARING A HYDRODESULFURIZATION CATALYST WHICH COMPRISES INITIALLY PRECIPITATING BASIC ALUMINUM SULFATE FROM A SOLUTION OF ALUMINUM SULFATE, HYDROLYZING THE PRECIPITATE, WHILE MAINTAINING THE RESULTING SLURRY AT A PH LESS THAN ABOUT 7.0, WITH A CHLORINE-CONTAINING COMPOUND IN AN AMOUNT TO FORM A SLURRY HAVING A FORMULA WEIGHT RATIO OF ALUMINA-EQUIVALENT TO CHLORIDE ION WITHIN THE RANGE OF FROM ABOUT 3:1 TO ABOUT 50:1, WASHING THE RESULTING HYDROLYZED PRECIPITATE UNTIL THE WASHED PREPITATE CONTAINS LESS THAN ABOUT 2.0 PERCENT BY WEIGHT OF SULFATE, DRYING AND CALCINING TO PRODUCE ALUMINA, COMBINING AT LEAST ONE METALLIC COMPONENT SELECTED FROM THE GROUP CONSISTING OF THE METALS OF GROUPS VI-A AND VIII OF THE PERIODIC TABLE WITH THE CALCINED ALUMINA AND THEREAFTER DRYING AND CALCING THE RESULTING COMPOSITE.
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) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |