Patent US2898307A successfully refreshed from Google Patents.
US2898307A
Expired / Lapsed
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A method for preparing aluminum hydrate compositions
Assignee: Sinclair Refining Co
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Filing: 1956-09-10
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Granted: 1959-08-04
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Expires: 1976-09-10
Abstract
No abstract record available.
Inventors
- 👤 Carl D Keith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:26
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/04; C01F7/14; C01F7/141
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
188 words
IN A METHOD FOR PREPARING AN ALUMINA HYDRATE COMPOSITION CONSISTING ESSENTIALLY OF ABOUT 10 TO 90 WEIGHT PERCENT OF ALUMINUM TRIHYDRATE AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF AMORPHOUS HYDROUS ALUMINA, ALUMINA MONOHYDRATE AND THEIR MIXTURE, THE STEPS COMPRISING MIXING AN AQUEOUS SOLUTION OF SODIUM ALUMINATE WITH A WATER-SOLUBLE COMPOUND WHICH IS ACIDACTING TOWARDS THE SODIUM ALUMINATE, WHILE MAINTAINING THE PH OF THE MIXTURE AT LEAST ABOUT 10.5 FOR AT LEAST ABOUT 5 MINUTES AND NO LONGER THAN A TIME SUFFICIENT TO PRECIPITATE ABOUT 10 TO 90 PERCENT OF ALUMINA TRIHYDRATE BASED UPON THE FINAL HYDRATE COMPOSITION AND FORMING AN AQUEOUS SLURRY OF THE ALUMINA TRIHYDRATE PRECIPITATE AND MIXING THE SLURRY WITH A WATR-SOLUBLE COMPOUND WHICH IS ACID-ACTING TOWARDS THE SODIUM ALUMINATE TO LOWER THE PH OF THE MIXTURE TO LESS THAN ABOUT 10 TO PRECIPITATE A MEMBER SELECTED FROM THE GROUP CONSISTING OF ALUMINA MONOHYDRATE, AMORPHOUS HYDROUS ALUMINA AND THEIR MIXTURE TO OBTAIN AN ALUMINA HYDRATE COMPOSITION ESSENTIALLY OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF AMORPHOUS HYDROUS ALMUINA, ALUMINA MONOHYDRATE AND THEIR MIXTURE AND ABOUT 10 TO 90 WEIGHT PERCENT OF ALUMINUM TRIHYDRATE.
Claim 2
Dependent Claim
188 words
IN A METHOD FOR PREPARING AN ALUMINA HYDRATE COMPOSITION CONSISTING ESSENTIALLY OF ABOUT 10 TO 90 WEIGHT PERCENT OF ALUMINUM TRIHYDRATE AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF AMORPHOUS HYDROUS ALUMINA, ALUMINA MONOHYDRATE AND THEIR MIXTURE, THE STEPS COMPRISING MIXING AN AQUEOUS SOLUTION OF SODIUM ALUMINATE WITH A WATER-SOLUBLE COMPOUND WHICH IS ACIDACTING TOWARDS THE SODIUM ALUMINATE, WHILE MAINTAINING THE PH OF THE MIXTURE AT LEAST ABOUT 10.5 FOR AT LEAST ABOUT 5 MINUTES AND NO LONGER THAN A TIME SUFFICIENT TO PRECIPITATE ABOUT 10 TO 90 PERCENT OF ALUMINA TRIHYDRATE BASED UPON THE FINAL HYDRATE COMPOSITION AND FORMING AN AQUEOUS SLURRY OF THE ALUMINA TRIHYDRATE PRECIPITATE AND MIXING THE SLURRY WITH A WATR-SOLUBLE COMPOUND WHICH IS ACID-ACTING TOWARDS THE SODIUM ALUMINATE TO LOWER THE PH OF THE MIXTURE TO LESS THAN ABOUT 10 TO PRECIPITATE A MEMBER SELECTED FROM THE GROUP CONSISTING OF ALUMINA MONOHYDRATE, AMORPHOUS HYDROUS ALUMINA AND THEIR MIXTURE TO OBTAIN AN ALUMINA HYDRATE COMPOSITION ESSENTIALLY OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF AMORPHOUS HYDROUS ALMUINA, ALUMINA MONOHYDRATE AND THEIR MIXTURE AND ABOUT 10 TO 90 WEIGHT PERCENT OF ALUMINUM TRIHYDRATE.
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) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |