US2903418A
Expired / Lapsed
US
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Preparation of eta alumina by acid hydrolysis
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1955-11-03
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Granted: 1959-09-08
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Expires: 1975-11-03
Abstract
No abstract record available.
Inventors
- 👤 Kirshenbaum Isidor
- 👤 John A Hinlicky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:03
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/02; B01J21/04; C; C10; C10G; C10G35/00; C10G35/04; C10G35/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
94 words
AN ATTRITION RESISTANT ETA ALUMINA ESPECIALLY ADAPTED FOR USE AS A CATALYST SUPPORT, SAID ETA ALUMINA BEING PREPARED BY THE PROCESS WHICH COMPRLIESE THE STEPS OF HYDROLYZING AN ALUMINUM ALCOHOLATE AT A PH IN THE RANGE OF 3 TO 5 WITH AN AQUEOUS SOLUTION OF A HALOGEN ACID; AGING THE RESULTANT ALUMINA PRECIPITATE CONTAINED AS AN AQUEOUS SLURRY OF HYDROUS ALUMINA FOR AT LEAST 5 HOURS DRYING THE ALUMINA SLURRY TO REMOVE THE AQUEOUS MEDIUM AND RECOVER THE ALUMIMA AND HEATING THE ALUMINA TO A TEMPERATURE IN THE RANGE OF ABOUT 400* TO 1500*F.
References Cited (Backward Citations)
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US2658028A
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US2773841A
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US2796326A
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US2746909A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |