US3193349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing boehmite of 50 to 80 a. crystal size
Assignee: Sinclair Research Inc
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Filing: 1962-04-13
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Granted: 1965-07-06
•
Expires: 1982-04-13
Abstract
No abstract record available.
Inventors
- 👤 Mooi John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:12
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/34; B; B01; B01J; B01J21/00; B01J21/02; B01J21/04; C01P; C01P2002/00; C01P2002/60
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
97 words
A METHOD OF PRODUCING CRYSTALLINE BOEHMITE HAVING A CRYSTAL SIZE TO 50 TO 85 A. WHICH COMPRISES SIMULTANEOUSLY ADDING TO WATER MAINTAINED AT A TEMPERATURE OF ABOUT 150 TO 215*F. AQUEOUS ALUMINUM CHLRIDE SOLUTION HAVING A MOLAR CONCENTRATION OF ABOUT 0.2 TO 6 AND AN AQUEOUS BASIC SOLUTION SELECTED FROM THE GROUP CONSISTING OF AMMONIA, AMMONIUM CARBONATE AND MIXTURES THEREOF, SAID BASIC SOLUTION HAVING A CONCENTRATION OF ABOUT 0.2 TO 15 NORMAL, MAINTAINING SAID TEMPERATURE DURING THE ADDITION AND REFLUXING THE RESULTANT MIXTURE TO OBTAIN CRYSTALLINE BOEHMITE HAVING AN AVERAGE CRYSTAL SIZE OF 50 TO 85 A.
Claim 2
Independent Claim
97 words
A METHOD OF PRODUCING CRYSTALLINE BOEHMITE HAVING A CRYSTAL SIZE TO 50 TO 85 A. WHICH COMPRISES SIMULTANEOUSLY ADDING TO WATER MAINTAINED AT A TEMPERATURE OF ABOUT 150 TO 215*F. AQUEOUS ALUMINUM CHLRIDE SOLUTION HAVING A MOLAR CONCENTRATION OF ABOUT 0.2 TO 6 AND AN AQUEOUS BASIC SOLUTION SELECTED FROM THE GROUP CONSISTING OF AMMONIA, AMMONIUM CARBONATE AND MIXTURES THEREOF, SAID BASIC SOLUTION HAVING A CONCENTRATION OF ABOUT 0.2 TO 15 NORMAL, MAINTAINING SAID TEMPERATURE DURING THE ADDITION AND REFLUXING THE RESULTANT MIXTURE TO OBTAIN CRYSTALLINE BOEHMITE HAVING AN AVERAGE CRYSTAL SIZE OF 50 TO 85 A.
Claim 3
Independent Claim
108 words
A METHOD OF PRODUCING CRYSTALLINE BOEHMITE HAVING A CRYSTAL SIZE OF 50 TO 85 A. WHICH COMPRISES SIMULTANEOUSLY ADDING TO WATER MAINTAINED AT A TEMPERATURE OF ABOUT 150 TO 215*F., AN AQUEOUS ALUMINUM CHLORIDE SOLUTION HAVING A MOLAR CONCENTRATION OF ABOUT 0.2 TO 6 AND AN AQUEOUS BASIC SOLUTION SELECTED FROM THE GROUP CONSISTING OF AMMONIA, AMMONIUM CARBONATE AND MIXTURES THEREOF, SAID BASIC SOLUTION HAVING A CONCENTRATION OF ABOUT 0.2 TO 15 NORMAL, MAINTAINING SAID TEMPERATURE DURING SAID ADDITION AND MAINTAINING THE PH OF THE RESULTING SLURRY DURING ADDITION AT ABOVE 7.5 TO 9 TO OBTAIN BOEHMITE CRYSTALS HAVING AN AVERAGE CRYSTAL SIZE OF 50 TO 85 A.
Claim 4
Independent Claim
108 words
A METHOD OF PRODUCING CRYSTALLINE BOEHMITE HAVING A CRYSTAL SIZE OF 50 TO 85 A. WHICH COMPRISES SIMULTANEOUSLY ADDING TO WATER MAINTAINED AT A TEMPERATURE OF ABOUT 150 TO 215*F., AN AQUEOUS ALUMINUM CHLORIDE SOLUTION HAVING A MOLAR CONCENTRATION OF ABOUT 0.2 TO 6 AND AN AQUEOUS BASIC SOLUTION SELECTED FROM THE GROUP CONSISTING OF AMMONIA, AMMONIUM CARBONATE AND MIXTURES THEREOF, SAID BASIC SOLUTION HAVING A CONCENTRATION OF ABOUT 0.2 TO 15 NORMAL, MAINTAINING SAID TEMPERATURE DURING SAID ADDITION AND MAINTAINING THE PH OF THE RESULTING SLURRY DURING ADDITION AT ABOVE 7.5 TO 9 TO OBTAIN BOEHMITE CRYSTALS HAVING AN AVERAGE CRYSTAL SIZE OF 50 TO 85 A.
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) | 1968-07-05 | 1969-01-04 | 1969-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-05 | 1973-01-04 | 1973-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-05 | 1977-01-04 | 1977-07-06 | $7700.00 | Window Closed / Lapsed |