Patent US2744625A successfully refreshed from Google Patents.
US2744625A
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Concentration of phosphate ores
Assignee: Minerals & Chemicals Corp Of A
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Filing: 1953-11-27
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Granted: 1956-05-08
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Expires: 1973-11-27
Abstract
No abstract record available.
Inventors
- 👤 Wesley M Houston
- 👤 Jr Harvie W Breathitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:49
CPC Classifications
B; B03; B03C; B03C7/00; B03C7/003; Y; Y10; Y10S; Y10S209/00; Y10S209/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A METHOD OF CONCENTRATING PHOSPHATE MINERALS FROM THEIR ORES WHICH INCLUDES THE FOLLOWING STEPS: (1) SUBJECTING THE ORE IN AN AQUEOUS PULP TO FROTH-FLOTATION TREATMENT WITH NEGATIVE-ION REAGENTS, THEREBY PRODUCING A FROTHPRODUCT WHICH IS A ROUGHER CONCENTRATE OF THE PHOSPHATE VALUES MIXED WITH SOME SILICIOUS GANGUE; (2) SUBJECTING THE SAID ROUGHER CONCENTRATE TO FROTH FLOATION TREATMENT IN WEAKLY ACID FLOTATION WATER AND REMOVING AS A PART OF THE FINAL PRODUCT A FROTH-PRODUCT HAVING A LOW INSOLUBLE CONTENT, AND A MACHINE DISCHARGE WHICH IS A PHOSPHATERICH MIDDLING; (3) DRYING SAID MIDDLING AND SUBJECTING IT TO ELECTROSTATIC SEPARATION TREATMENT, THEREBY PRODUCING A HIGH-GRADE PHOSPHATE CONCENTRATE WHICH CAN BE COMBINED WITH THE PREVIOUSLY MENTIONED FROTH-PRODUCT HAVING A LOW INSOLUBLE CONTENT, AND A SILICIOUS GANGUE WHICH IS DISCARDED; THEREBY PRODUCING A FINAL HIGH-GRADE PHOSPHATE CONCENTRATE CONTAINING A HIGH PROPORTION OF THE PHOSPHATE IN THE ORE.
Claim 2
Independent Claim
141 words
A METHOD OF CONCENTRATING PHOSPHATE MINERALS FROM THEIR ORES WHICH INCLUDES THE FOLLOWING STEPS: (1) SUBJECTING THE ORE IN AN AQUEOUS PULP TO FROTH-FLOTATION TREATMENT WITH NEGATIVE-ION REAGENTS, THEREBY PRODUCING A FROTHPRODUCT WHICH IS A ROUGHER CONCENTRATE OF THE PHOSPHATE VALUES MIXED WITH SOME SILICIOUS GANGUE; (2) SUBJECTING THE SAID ROUGHER CONCENTRATE TO FROTH FLOATION TREATMENT IN WEAKLY ACID FLOTATION WATER AND REMOVING AS A PART OF THE FINAL PRODUCT A FROTH-PRODUCT HAVING A LOW INSOLUBLE CONTENT, AND A MACHINE DISCHARGE WHICH IS A PHOSPHATERICH MIDDLING; (3) DRYING SAID MIDDLING AND SUBJECTING IT TO ELECTROSTATIC SEPARATION TREATMENT, THEREBY PRODUCING A HIGH-GRADE PHOSPHATE CONCENTRATE WHICH CAN BE COMBINED WITH THE PREVIOUSLY MENTIONED FROTH-PRODUCT HAVING A LOW INSOLUBLE CONTENT, AND A SILICIOUS GANGUE WHICH IS DISCARDED; THEREBY PRODUCING A FINAL HIGH-GRADE PHOSPHATE CONCENTRATE CONTAINING A HIGH PROPORTION OF THE PHOSPHATE IN THE ORE.
References Cited (Backward Citations)
US2197865A
Cited
US2661842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |