US2886512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing a silica-alumina gel catalyst and a hydrocarbon cracking process using said catalyst
Assignee: WR Grace and Co
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Filing: 1955-08-30
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Granted: 1959-05-12
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Expires: 1975-08-30
Abstract
No abstract record available.
Inventors
- 👤 Milton E Winyall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:17
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/12; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
89 words
A PROCESS FOR CRACKING HYDROCARBON OILS WHICH COMPRISES PASSING THE OIL UNDER CRACKING CONDITIONS THROUGH A CRACKING ZONE CONTAINING A SILICA-ALUMINA CATALYST HAVING ABOUT 10-40% ALUMINA PREPARED BY CONTACTING AN AQUEOUS ALKALI METAL SILICATE SOLUTION WITH CARBON DIOXIDE TO FORM A SILICA HYDROGEL CONTAINING DISSOLVED CARBONATE, COMMINGLING WIHT SAID HYDROGEL AND THE RESULTING DISSOLVED CARBONATE AN AQUEOUS SOLUTION OF AN ALUMINUM SALT OF A STRONG MINERAL ACID WHEREBY ALUMINA IS PRECIPITATED SALT OF A STRONG MINERAL ACID WHEREBY ON SAID HYDROGEL, AND WASHING AND DRYING THE RESULTING SILICA-ALUMINA COMPOSITE.
References Cited (Backward Citations)
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US2174177A
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US2386337A
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US2469314A
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US2595339A
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US2601235A
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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) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |