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Patent US3157591A successfully refreshed from Google Patents.
US3157591A
Expired / Lapsed
US
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Silica-alumina-magnesia catalyst and method of converting hydrocarbons
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1961-12-04
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Granted: 1964-11-17
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Expires: 1981-12-04
Abstract
No abstract record available.
Inventors
- 👤 Defeo Richard Joseph
- 👤 Elroy M Gladrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:29
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
128 words
A METHOD OF CRACKING HIGHER BOILING HYDROCARBONS TO PRODUCE INCREASED YIELDS OF NAPHTHA AND HEATING OIL AND DECREASED YIELDS OF GAS, COKE AND 650*F. + MATERIAL WHICH COMPRISES CONTACTING HIGH BOILING HYDROCARBONS AT A CONVERSION TEMPERATURE WITH A SILICA-ALUMINA-MAGNESIA CATALYST CONTANING BETWEEN ABOUT 20 AND 40 WT. PERCENT AL2O3 AND BETWEEN ABOUT 2 AND 10 WT. PERCENT MGO AND THE REST SIO2 MADE BY MIXING SILICA HYDROSOL MADE BY TREATING AN ALKALI METAL SILICATE SOLUTION WITH A CATION EXCHANGE MATERIAL WITH ALUMINUM ALCOHOLATE TO FORM A SLURRY OF SILICA AND ALUMINA, ADDING A MAGNESIUM COMPOUND, ADJUSTING THE PH OF SAID SLURRY TO ABOUT 7.0 AND THEN GELLING THE MIXTURE, AGING THE GELLED MATERIAL FOR ABOUT 24 TO 72 HOURS AT ROOM TEMPERATURE AND THEN DRYING THE AGED MIXTURE.
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) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |