US3004929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing a catalyst support
Assignee: Pure Oil Co
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Filing: 1958-11-19
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Granted: 1961-10-17
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Expires: 1978-11-19
Abstract
No abstract record available.
Inventors
- 👤 Kenneth E Lucas
- 👤 Hillis O Folkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:02
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/02; B01J37/03; B01J37/036; B01J2/00; B01J2/20; B01J23/00; B01J23/70; B01J27/00; B01J27/06; B01J27/128; B01J27/13; B01J37/0009; B01J37/0201
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
IN A METHOD OF PREPARING A CATALYST SUPPORT BY PRECIPITATING SILICA AND ALUMINA FROM SOLUTIONS OF SILICON AND ALUMINUM SALTS TO PRODUCE A HYDROGEL CONTAINING MORE THAN 90% W. WATER AND 70-90% SILICA ON A DRY-WEIGHT BASIS, FILTERING THE PRECIPITATE TO REMOVE EXCESS WATER, SUBJECTING THE PRECIPITATE TO ION-EXCHANGE TO REMOVE UNDESIRED BY-PRODUCTS, AND WASHING THE PRECIPITATE, THE IMPROVEMENT WHICH COMPRISES AIR-DRYING THE WASHED SILICAALUMINA HYDROGEL AT 225*-400*F. FOR A TIME SUFFICIENT TO CONVERT THE HYDROGEL TO A SMOOTH PASTE CONTAINING AN AMOUNT OF WATER PROPORTIONAL TO THE AMOUNT OF SILICA IN THE HYDROGEL IN THE RANGE BETWEEN THE UPPER AND LOWER LINES IN FIG. 1, EXTRUDING THE PASTE THROUGH A DIE, CUTTING THE EXTRUDATE INTO SMALL PELLETS, AND DRYING AND CALCINING THE PELLETS.
Claim 2
Dependent Claim
124 words
IN A METHOD OF PREPARING A CATALYST SUPPORT BY PRECIPITATING SILICA AND ALUMINA FROM SOLUTIONS OF SILICON AND ALUMINUM SALTS TO PRODUCE A HYDROGEL CONTAINING MORE THAN 90% W. WATER AND 70-90% SILICA ON A DRY-WEIGHT BASIS, FILTERING THE PRECIPITATE TO REMOVE EXCESS WATER, SUBJECTING THE PRECIPITATE TO ION-EXCHANGE TO REMOVE UNDESIRED BY-PRODUCTS, AND WASHING THE PRECIPITATE, THE IMPROVEMENT WHICH COMPRISES AIR-DRYING THE WASHED SILICAALUMINA HYDROGEL AT 225*-400*F. FOR A TIME SUFFICIENT TO CONVERT THE HYDROGEL TO A SMOOTH PASTE CONTAINING AN AMOUNT OF WATER PROPORTIONAL TO THE AMOUNT OF SILICA IN THE HYDROGEL IN THE RANGE BETWEEN THE UPPER AND LOWER LINES IN FIG. 1, EXTRUDING THE PASTE THROUGH A DIE, CUTTING THE EXTRUDATE INTO SMALL PELLETS, AND DRYING AND CALCINING THE PELLETS.
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) | 1964-10-16 | 1965-04-17 | 1965-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-16 | 1969-04-17 | 1969-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-16 | 1973-04-17 | 1973-10-17 | $7700.00 | Window Closed / Lapsed |