US2898196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating pyrrhotitic mineral sulphides containing non-ferrous metal values for the recovery of said metal values and sulfur
Assignee: Viridian Inc Canada
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Filing: 1953-10-22
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Granted: 1959-08-04
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Expires: 1973-10-22
Abstract
No abstract record available.
Inventors
- 👤 Frank A Forward
- 👤 Anna M Armstrong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:15
CPC Classifications
C; C22; C22B; C22B23/00; C22B23/04; C22B23/0407; C22B23/0415; C22B23/043; C01; C01B; C01B17/00; C01B17/02; C01B17/06; C01G; C01G1/00; C01G1/12; C22B1/00; C22B1/11; C22B3/00; C22B3/04; C22B3/06; C22B3/08; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
THE METHOD OF PRODUCING ELEMENTAL SULPHUR AND OF SEPARATING NON-FERROUS METAL SULPHIDES FROM PYRRHOTITIC MINERAL SULPHIDES CONTAINING NON-FERROUS METAL VALUES WHICH COMPRISES THE STEPS OF DISPERSING PYRROHOTITIC MINERAL VALUES CONTAINING NON-FERROUS METAL SULPHIDES IN AN AQUEOUS ACID SULPHATE LEACH SOLUTION TO FORM A SLURRY, REACTING THE SLURRY IN A REACTION ZONE AT A TEMPERATURE OF FROM ABOUT 245* TO ABOUT 290* F. UNDER A PARTIAL PRESSURE OF OXYGEN FROM 25 TO 100 POUNDS PER SQUARE INCH, FEEDING A FREE OXYGEN BEARING OXIDIZING GAS INTO THE REACTION VESSEL, ACTIVELY AGITATING THE SLURRY AND CONTINUING THE TREATMENT TO OXIDIZE SULPHIDE SULPHUR IN THE PYRRHOTITIC MATERIAL TO ELEMENTAL SULPHUR WHEREBY NON-FERROUS METAL VALUES ARE SIMULTANEOUSLY ATTACHED TO GLOBULES OF MOLTEN ELEMENTAL SULPHUR, COOLING THE SLURRY BELOW THE MELTING TEMPERATURE OF SULPHUR TO SOLIDIFY SAID GLOBULES AND THUS FORM ELEMENTAL SULPHUR PELLETS, SEPARATING SOLID RESIDUE FROM THE SLURRY, RECOVERING ELEMENTAL SULPHUR PELLETS AND ENTRAINED NON-FERROUS METAL VALUES FROM SAID SOLID RESIDUE, AND SEPARATING AND RRCOVERING THE ELEMENTAL SULPHUR FROM THE NON-FERROUS METAL VALUES WHICH ARE PRESENT IN THE SULPHUR PELLETS.
Claim 2
Independent Claim
176 words
THE METHOD OF PRODUCING ELEMENTAL SULPHUR AND OF SEPARATING NON-FERROUS METAL SULPHIDES FROM PYRRHOTITIC MINERAL SULPHIDES CONTAINING NON-FERROUS METAL VALUES WHICH COMPRISES THE STEPS OF DISPERSING PYRROHOTITIC MINERAL VALUES CONTAINING NON-FERROUS METAL SULPHIDES IN AN AQUEOUS ACID SULPHATE LEACH SOLUTION TO FORM A SLURRY, REACTING THE SLURRY IN A REACTION ZONE AT A TEMPERATURE OF FROM ABOUT 245* TO ABOUT 290* F. UNDER A PARTIAL PRESSURE OF OXYGEN FROM 25 TO 100 POUNDS PER SQUARE INCH, FEEDING A FREE OXYGEN BEARING OXIDIZING GAS INTO THE REACTION VESSEL, ACTIVELY AGITATING THE SLURRY AND CONTINUING THE TREATMENT TO OXIDIZE SULPHIDE SULPHUR IN THE PYRRHOTITIC MATERIAL TO ELEMENTAL SULPHUR WHEREBY NON-FERROUS METAL VALUES ARE SIMULTANEOUSLY ATTACHED TO GLOBULES OF MOLTEN ELEMENTAL SULPHUR, COOLING THE SLURRY BELOW THE MELTING TEMPERATURE OF SULPHUR TO SOLIDIFY SAID GLOBULES AND THUS FORM ELEMENTAL SULPHUR PELLETS, SEPARATING SOLID RESIDUE FROM THE SLURRY, RECOVERING ELEMENTAL SULPHUR PELLETS AND ENTRAINED NON-FERROUS METAL VALUES FROM SAID SOLID RESIDUE, AND SEPARATING AND RRCOVERING THE ELEMENTAL SULPHUR FROM THE NON-FERROUS METAL VALUES WHICH ARE PRESENT IN THE SULPHUR PELLETS.
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 |