Patent US3140250A successfully refreshed from Google Patents.
US3140250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of silica-zirconia-alumina catalyst
Assignee: ExxonMobil Oil Corp
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Filing: 1961-03-13
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Granted: 1964-07-07
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Expires: 1981-03-13
Abstract
No abstract record available.
Inventors
- 👤 Robert H Cramer
- 👤 Sylvander C Eastwood
- 👤 Abbott F Houser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:49
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/12; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
A METHOD WHICH COMRPISES MIXING AN AQUEOUS SOLUTION OF AN ALKALI METAL SILICATE WITH AN AQUEOUS SOLUTION OF A ZIRCONIUM SALT AND AN ALUMINUM SALT, SAID MIXING BEING CARRIED OUT WITH SUCH PROPORTIONS OF SAID SOLUTIONS AS TO RESULT IN A HYDROSOL HAVING A PH OF FROM 7 TO 10 AND TO SUBSTANTIALLY SET TO A HYDROGEL CONTAINING FROM 5 TO 15 PERCENT ZRO2, FROM 5 TO 10 PERCENT AL2O3, AND FROM 75 TO 90 PERCENT SIO2 BASED ON CO-GELLED OXIDES ONLY, PERMITTING SAID HYDROSOL TO SET TO A HYDROGEL, ACTIVATING SAID HYDROGEL BY TREATMENT FOR FROM 1 TO 24 HOURS AT A TEMPERATURE OF FROM 125 TO 200*F. WITH AN AQUEOUS SOLUTION HAVING AS THE SOLUTE THEREFOR A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A MINERAL ACID, AN ALUMINUM SALT, AND MIXTURES THEREOF, SAID SOLUTION HAVING A PH OF FROM ZERO TO 7, WASHING SAID HYDROGEL FREE OF WATERSOLUBLE MATERIAL, DRYING AND CALCINING TO THEREBY OBTAIN A SOLID, POROUS CATALYST OF SILICA-ZIRCONIA-ALUMINA, AND THEREAFTER CONTACTING SAID CATALYST WITH A HYDROCARBON CHARGE UNDER CATALYTIC CRACKING CONDITIONS TO THEREBY OBTAIN AN IMPROVED GASOLINE YIELD THEREFROM.
Claim 2
Independent Claim
185 words
A METHOD WHICH COMRPISES MIXING AN AQUEOUS SOLUTION OF AN ALKALI METAL SILICATE WITH AN AQUEOUS SOLUTION OF A ZIRCONIUM SALT AND AN ALUMINUM SALT, SAID MIXING BEING CARRIED OUT WITH SUCH PROPORTIONS OF SAID SOLUTIONS AS TO RESULT IN A HYDROSOL HAVING A PH OF FROM 7 TO 10 AND TO SUBSTANTIALLY SET TO A HYDROGEL CONTAINING FROM 5 TO 15 PERCENT ZRO2, FROM 5 TO 10 PERCENT AL2O3, AND FROM 75 TO 90 PERCENT SIO2 BASED ON CO-GELLED OXIDES ONLY, PERMITTING SAID HYDROSOL TO SET TO A HYDROGEL, ACTIVATING SAID HYDROGEL BY TREATMENT FOR FROM 1 TO 24 HOURS AT A TEMPERATURE OF FROM 125 TO 200*F. WITH AN AQUEOUS SOLUTION HAVING AS THE SOLUTE THEREFOR A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A MINERAL ACID, AN ALUMINUM SALT, AND MIXTURES THEREOF, SAID SOLUTION HAVING A PH OF FROM ZERO TO 7, WASHING SAID HYDROGEL FREE OF WATERSOLUBLE MATERIAL, DRYING AND CALCINING TO THEREBY OBTAIN A SOLID, POROUS CATALYST OF SILICA-ZIRCONIA-ALUMINA, AND THEREAFTER CONTACTING SAID CATALYST WITH A HYDROCARBON CHARGE UNDER CATALYTIC CRACKING CONDITIONS TO THEREBY OBTAIN AN IMPROVED GASOLINE YIELD THEREFROM.
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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |