US2861945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating a silica-alumina cracking catalyst
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1954-12-28
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Granted: 1958-11-25
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Expires: 1974-12-28
Abstract
No abstract record available.
Inventors
- 👤 Kenneth K Kearby
- 👤 Edward G Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:21
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/02; B01J21/00; B01J21/12; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; B01J37/00; B01J37/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A METHOD OF IMPROVING THE ACTIVITY OF FRESH PREVIOUSLY CALCINED SICLICA AND A MINOR PROPORTION OF ALUMINA PROPORTION OF SILICA AND A MINOR PROPORTIONOF ALUMINA AND PREPARED FROM SOLUTIONS OF SODIUM SILICATE AND SULFURIC ACID AND AN ALUMINUM COMPOUND AND AMMONIA WHICH COMPRISES CONTACTING THE SILICA-ALUMINA CATALYST WITH WATER FOR AN EXTENDED PERIOD OF TIME TO REDUCE THE PH OF THE CATALYST AND THEN TREATING THE WASHED SILICAALUMINA CATALYST WITH A SATURATED AQUEOUS SOLUTION OF A BASIC MAGNESIUM CARBONATE FOR AN EXTENDED PERIOD OF TIME, AND THEN DRYING AND CALCINING THE WASHED AND TREATED CATALYST.
Claim 2
Independent Claim
95 words
A METHOD OF IMPROVING THE ACTIVITY OF FRESH PREVIOUSLY CALCINED SICLICA AND A MINOR PROPORTION OF ALUMINA PROPORTION OF SILICA AND A MINOR PROPORTIONOF ALUMINA AND PREPARED FROM SOLUTIONS OF SODIUM SILICATE AND SULFURIC ACID AND AN ALUMINUM COMPOUND AND AMMONIA WHICH COMPRISES CONTACTING THE SILICA-ALUMINA CATALYST WITH WATER FOR AN EXTENDED PERIOD OF TIME TO REDUCE THE PH OF THE CATALYST AND THEN TREATING THE WASHED SILICAALUMINA CATALYST WITH A SATURATED AQUEOUS SOLUTION OF A BASIC MAGNESIUM CARBONATE FOR AN EXTENDED PERIOD OF TIME, AND THEN DRYING AND CALCINING THE WASHED AND TREATED CATALYST.
References Cited (Backward Citations)
US2302297A
Cited
US2348647A
Cited
US2414736A
Cited
US2540689A
Cited
US2472834A
Cited
US2638453A
Cited
US2669547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |