Patent US2861945A successfully refreshed from Google Patents.
US2861945A
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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 20:21
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)
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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 |