Patent US2796326A successfully refreshed from Google Patents.
US2796326A
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Process for making eta alumina from aluminum alcoholates
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1954-02-09
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Granted: 1957-06-18
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Expires: 1974-02-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles N Kimberlin
- 👤 Elroy M Gladrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:31
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/34; C01F7/36; B; B01; B01J; B01J21/00; B01J21/02; B01J21/04; C01F7/68; C01F7/74; C01F7/76
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN THE PREPARATION OF AN ALUMINA ESPECIALLY ADAPTED FOR USE AS A CATALYST SUPPORT AND CONSISTING RPEDOMINANTLY OF ETA ALUMINA, THE IMPROVEMENT WHICH COMPRISES HYDROLYZING AN ALUMINA ALCOHOLATE WITH WATER AT A TEMPERATURE IN THE RANGE OF 32-70F., THE AMOUNT OF WATER UTILIZED BEING IN THE RANGE OF 1-10 VOLUMES OF WATER PER VOLUME OF ALCOHOLATE; AGING THE RESULTING ALUMINA PRECIPITATE CONTAINED AS AN AQUEOUS SLURRY OF HYDROUS ALUMINA FOR A PERIOD OF TIME IN THE RANGE OF 20 TO 65 HOURS; DRYING THE SLURRY TO REMOVE THE AQUEOUS MEDIUM AND RECOVERING ALUMINA CONSISTING PREDOMINANTLY OF BETA TRIHYDRATE, SAID CONDITIONS OF ALUMINA PREPARATION BEING CRITICALLY SELECTED WITH RESPECT OT EACH OTHER WITHIN SAID RANGES WHEREBY ON SUBSEQUENT HEATING IN THE RANGE OF 650 TO 1200* F. PREDOMINANTLY ETA ALUMINA IS OBTAINABLE.
Claim 2
Dependent Claim
131 words
IN THE PREPARATION OF AN ALUMINA ESPECIALLY ADAPTED FOR USE AS A CATALYST SUPPORT AND CONSISTING RPEDOMINANTLY OF ETA ALUMINA, THE IMPROVEMENT WHICH COMPRISES HYDROLYZING AN ALUMINA ALCOHOLATE WITH WATER AT A TEMPERATURE IN THE RANGE OF 32-70F., THE AMOUNT OF WATER UTILIZED BEING IN THE RANGE OF 1-10 VOLUMES OF WATER PER VOLUME OF ALCOHOLATE; AGING THE RESULTING ALUMINA PRECIPITATE CONTAINED AS AN AQUEOUS SLURRY OF HYDROUS ALUMINA FOR A PERIOD OF TIME IN THE RANGE OF 20 TO 65 HOURS; DRYING THE SLURRY TO REMOVE THE AQUEOUS MEDIUM AND RECOVERING ALUMINA CONSISTING PREDOMINANTLY OF BETA TRIHYDRATE, SAID CONDITIONS OF ALUMINA PREPARATION BEING CRITICALLY SELECTED WITH RESPECT OT EACH OTHER WITHIN SAID RANGES WHEREBY ON SUBSEQUENT HEATING IN THE RANGE OF 650 TO 1200* F. PREDOMINANTLY ETA ALUMINA IS OBTAINABLE.
References Cited (Backward Citations)
US2247624A
Cited
US2406420A
Cited
US2579251A
Cited
US2636865A
Cited
GB667145A
Cited
US2663620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-17 | 1960-12-17 | 1961-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-17 | 1964-12-17 | 1965-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-17 | 1968-12-17 | 1969-06-18 | $7700.00 | Window Closed / Lapsed |