US3241950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous acid oxidation of copper bearing mineral sulphides
Assignee: Viridian Inc Canada
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Filing: 1963-02-13
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Granted: 1966-03-22
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Expires: 1983-02-13
Abstract
No abstract record available.
Inventors
- 👤 Mackiw Vladimir Nicolaus
- 👤 Veltman Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:46
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0063; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
THE METHOD OF RECOVERING COPPER VALUES FROM METALLIC SULPHIDE ORE BULK CONCENTRATE CONTAINING HIGHLY DISSEMINATED CHALCOCITE AND PYRITE FRACTIONS NOT READILY SEPARABLE BY BLOTATION WHICH COMPRISES THE STEPS OF DISPERSING SAID CONCENTRATE IN FINELY DIVIDED FORM IN AN AQUEOUS ACID LEACH SOLUTION WHICH CONTAINS SULPHURIC ACID IN AN AMOUNT AT LEAST SUFFICIENT TO COMBINE WITH THE COPPER VALUES PRESENT IN SAID CONCENTRATES TO FORM SULPHATES; REACTING THE RESULTANT SLURRY AT A TEMPERATURE ABOVE ABOUT 175*F. BUT BELOW THE MELTING POINT OF SULPHUR WITH A FREE OXYGEN BEARING OXIDIZING GAS; CONTINUING SAID REACTION WITH SAID OXIDIZING GAS TO EXTRACT COPPER VALUES CONTAINED IN SAID CONCENTRATE AND CONVERT SULPHUR BOUND TO SAID COPPER VALUES TO ELEMENTAL FORM; TERMINATING SAID REACTION WHILE SUBSTANTIALLY ALL OF THE PYRITE FRACTION OF SAID CONCENTRATE REMAINS UNATTACKED BY THE LEACH SOLUTION TO LEAVE A RESIDUE CONTAINING ELEMENTAL SULPHUR AND PYRITE; SEPARATING THE SAID RESIDUE FROM THE LEACH SOLUTION AND RECOVERING COPPER VALUES FROM SAID LEACH SOLUTION.
Claim 2
Independent Claim
159 words
THE METHOD OF RECOVERING COPPER VALUES FROM METALLIC SULPHIDE ORE BULK CONCENTRATE CONTAINING HIGHLY DISSEMINATED CHALCOCITE AND PYRITE FRACTIONS NOT READILY SEPARABLE BY BLOTATION WHICH COMPRISES THE STEPS OF DISPERSING SAID CONCENTRATE IN FINELY DIVIDED FORM IN AN AQUEOUS ACID LEACH SOLUTION WHICH CONTAINS SULPHURIC ACID IN AN AMOUNT AT LEAST SUFFICIENT TO COMBINE WITH THE COPPER VALUES PRESENT IN SAID CONCENTRATES TO FORM SULPHATES; REACTING THE RESULTANT SLURRY AT A TEMPERATURE ABOVE ABOUT 175*F. BUT BELOW THE MELTING POINT OF SULPHUR WITH A FREE OXYGEN BEARING OXIDIZING GAS; CONTINUING SAID REACTION WITH SAID OXIDIZING GAS TO EXTRACT COPPER VALUES CONTAINED IN SAID CONCENTRATE AND CONVERT SULPHUR BOUND TO SAID COPPER VALUES TO ELEMENTAL FORM; TERMINATING SAID REACTION WHILE SUBSTANTIALLY ALL OF THE PYRITE FRACTION OF SAID CONCENTRATE REMAINS UNATTACKED BY THE LEACH SOLUTION TO LEAVE A RESIDUE CONTAINING ELEMENTAL SULPHUR AND PYRITE; SEPARATING THE SAID RESIDUE FROM THE LEACH SOLUTION AND RECOVERING COPPER VALUES FROM SAID LEACH SOLUTION.
References Cited (Backward Citations)
US981451A
Cited
US2746859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |