US3222297A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agglomeration of bauxite fines
Assignee: BASF Catalysts LLC
•
Filing: 1962-07-12
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Granted: 1965-12-07
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Expires: 1982-07-12
Abstract
No abstract record available.
Inventors
- 👤 Aldo P Allegrini
- 👤 Tom A Cecil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:33
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/24; C22B1/242; C22B1/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A METHOD FOR AGGLOMERATING BAUXITE FINES WHICH COMPRISES: MIXING BAUXITE FINES WHICH HAVE BEEN CALCINED AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 600*F. TO ABOUT 1600*F. TO A BOLATILE MATTER CONTENT BELOW 10% WITH A SUFFICIENT QUANTITY OF A MIXTURE OF SULFURIC ACID AND PHOSPHORIC ACID TO PERMIT AGGLOMERATION OF SAID FINES, SAID MIXTURE OF ACIDS BEING OF 90% TO 100% CONCENTRATION AND CONTAINING FROM ABUT 1 1/2 TO ABOUT 3 1/2 PARTS BY WEIGH TOF ''ISO4 TO 1 PART BY WEIGHT OF H3PO4, FORMING THE MIXTURE INTO AGGLOMERATES, HEATING SAID AGGLOMERATES AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 200* TO ABOUT 400*F. FOR A TIME SUFFICIENT FOR SAID ACIDS TO REACT SUBSTANTIALLY COMPLETELY WITH ALUMINUM IN SAID BAUXITE FINES AND, WITHOUT WASHING THEM, CALCINING THE AGED AGGLOMERATES AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 900*F. TO ABOUT 1800*F. FOR A TIME SUFFICIENT TO ELIMINATE SULFATE SUBSTANTIALLY COMPLETELY THEREFROM.
Claim 2
Independent Claim
152 words
A METHOD FOR AGGLOMERATING BAUXITE FINES WHICH COMPRISES: MIXING BAUXITE FINES WHICH HAVE BEEN CALCINED AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 600*F. TO ABOUT 1600*F. TO A BOLATILE MATTER CONTENT BELOW 10% WITH A SUFFICIENT QUANTITY OF A MIXTURE OF SULFURIC ACID AND PHOSPHORIC ACID TO PERMIT AGGLOMERATION OF SAID FINES, SAID MIXTURE OF ACIDS BEING OF 90% TO 100% CONCENTRATION AND CONTAINING FROM ABUT 1 1/2 TO ABOUT 3 1/2 PARTS BY WEIGH TOF ''ISO4 TO 1 PART BY WEIGHT OF H3PO4, FORMING THE MIXTURE INTO AGGLOMERATES, HEATING SAID AGGLOMERATES AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 200* TO ABOUT 400*F. FOR A TIME SUFFICIENT FOR SAID ACIDS TO REACT SUBSTANTIALLY COMPLETELY WITH ALUMINUM IN SAID BAUXITE FINES AND, WITHOUT WASHING THEM, CALCINING THE AGED AGGLOMERATES AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 900*F. TO ABOUT 1800*F. FOR A TIME SUFFICIENT TO ELIMINATE SULFATE SUBSTANTIALLY COMPLETELY 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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |