US3019080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of alumina
Assignee: Imperial Chemical Industries Ltd
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Filing: 1958-04-30
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Granted: 1962-01-30
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Expires: 1978-04-30
Abstract
No abstract record available.
Inventors
- 👤 Vincent George Clarkson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:38
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/34; C01F7/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A PROCESS FOR THE PRODUCTION OF SUBSTANTIALLY PURE ALUMINA WHICH COMPRISES THE STEPS OF REACTING ALUMINUM WITH A MONOHYDRIC ALCOHOL CONTAINING FROM 2 TO 4 CARBON ATOMS TO FORM A SOLUTION OF AN ALUMINUM ALKOXIDE IN THE ALCOHOL, SAID ALUMINUM CONTAINING IMPURITIES WHICH EXIST IN COLLOIDAL FORM UPON REACTION WITH SAID ALCOHOL, ADDING TO THE SOLUTION AT LEAST ONE LIQUID HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF PENTANE, HEXANE, BENZENE, TOLUENE, XYLENE, AND PETROLEUM ETHER, TO EFFECT DEPOSITION OF SAID IMPURITIES, SEPARATING SAID IMPURITIES FROM THE SOLUTION, THEREAFTER HYDROLYZING THE ALKOXIDE, AND RECOVERING PURE ALUMINA THEREFROM.
Claim 2
Dependent Claim
96 words
A PROCESS FOR THE PRODUCTION OF SUBSTANTIALLY PURE ALUMINA WHICH COMPRISES THE STEPS OF REACTING ALUMINUM WITH A MONOHYDRIC ALCOHOL CONTAINING FROM 2 TO 4 CARBON ATOMS TO FORM A SOLUTION OF AN ALUMINUM ALKOXIDE IN THE ALCOHOL, SAID ALUMINUM CONTAINING IMPURITIES WHICH EXIST IN COLLOIDAL FORM UPON REACTION WITH SAID ALCOHOL, ADDING TO THE SOLUTION AT LEAST ONE LIQUID HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF PENTANE, HEXANE, BENZENE, TOLUENE, XYLENE, AND PETROLEUM ETHER, TO EFFECT DEPOSITION OF SAID IMPURITIES, SEPARATING SAID IMPURITIES FROM THE SOLUTION, THEREAFTER HYDROLYZING THE ALKOXIDE, AND RECOVERING PURE ALUMINA THEREFROM.
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) | 1965-01-29 | 1965-07-31 | 1966-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-29 | 1969-07-31 | 1970-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-29 | 1973-07-31 | 1974-01-30 | $7700.00 | Window Closed / Lapsed |