US2914488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of eta alumina utilizing chlorine and ammonia
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1954-01-05
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Granted: 1959-11-24
•
Expires: 1974-01-05
Abstract
No abstract record available.
Inventors
- 👤 George R Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:52
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/02; B01J21/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
76 words
THE METHOD OF PREPARING ALUMINA ESPECIALLY ADAPTED FOR USE AS CATALYST SUPPORT AND CONSISTING PERDOMINANTLY OF ETA ALUMINA, WHICH COMPRISES THE STEPS OF TREATING ALUMINUM METAL WITH CHLORINE WATER; ADDING AMMONIA TO THE RESULTING SOLUTION TO FORM A SLURRY OF HYDROUS ALUMINA; DRYING THE ALUMINA SLURRY TO REMOVE THE AQUEOUS MEDIUM AND ANY CHLORINE AND AMMONIA PERSENT AND RECOVER THE ALUMINA; AND HEATING IT TO A TEMPERATURE IN THE RANGE OF 400*-1250*F. TO FURTHER DEHYDRATE IT
Claim 2
Independent Claim
76 words
THE METHOD OF PREPARING ALUMINA ESPECIALLY ADAPTED FOR USE AS CATALYST SUPPORT AND CONSISTING PERDOMINANTLY OF ETA ALUMINA, WHICH COMPRISES THE STEPS OF TREATING ALUMINUM METAL WITH CHLORINE WATER; ADDING AMMONIA TO THE RESULTING SOLUTION TO FORM A SLURRY OF HYDROUS ALUMINA; DRYING THE ALUMINA SLURRY TO REMOVE THE AQUEOUS MEDIUM AND ANY CHLORINE AND AMMONIA PERSENT AND RECOVER THE ALUMINA; AND HEATING IT TO A TEMPERATURE IN THE RANGE OF 400*-1250*F. TO FURTHER DEHYDRATE IT
Claim 3
Dependent Claim
77 words
AN IMPROVED METHOD OF PREPARING A CATALYST COMPRISING THE STEPSS OF TRETING ALUMINUM METAL WITH CHLORINE WATER, ADDING AMMONIA TO THE RESULTING SOLUTION TO FROM A SLURRY OF HYDROUS ALUMINA, DRYING THE ALUMINA SLURRY TO REMOVE THE AQUEOUS MEDIUM AND ANY CHLORINE AND AMMONIA PRESENT AND RECOVER THE ALUMINA, AND HEATING IT TO A TEMPERATURE IN THE RANGE OF 400* TO 1250*F. TO FURTHER DEHYDRATE IT, AND THEREAFTER SUPPORTING A CATALYTIC AGENT ON THE SAID TREATED ALUMINA.
Claim 4
Dependent Claim
77 words
AN IMPROVED METHOD OF PREPARING A CATALYST COMPRISING THE STEPSS OF TRETING ALUMINUM METAL WITH CHLORINE WATER, ADDING AMMONIA TO THE RESULTING SOLUTION TO FROM A SLURRY OF HYDROUS ALUMINA, DRYING THE ALUMINA SLURRY TO REMOVE THE AQUEOUS MEDIUM AND ANY CHLORINE AND AMMONIA PRESENT AND RECOVER THE ALUMINA, AND HEATING IT TO A TEMPERATURE IN THE RANGE OF 400* TO 1250*F. TO FURTHER DEHYDRATE IT, AND THEREAFTER SUPPORTING A CATALYTIC AGENT ON THE SAID TREATED ALUMINA.
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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) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |