US2898197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating pyrrhotitic mineral sulphides containing non-ferrous metal values
Assignee: Viridian Inc Canada
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Filing: 1958-11-05
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Granted: 1959-08-04
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Expires: 1978-11-05
Abstract
No abstract record available.
Inventors
- 👤 Frank A Forward
- 👤 Anna M Armstrong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:19
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; C22B3/00; C22B3/04; C22B3/06; C22B3/08; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
203 words
THE METHOD OF PRODUCING ELEMENTAL SULPHUR AND OF RECOVERING NON-FERROUS METAL VALUES FROM PYRRHOTITIC MINERAL SULPHIDES WHICH CONTAIN NON-FERROUS METAL VALUES WHICH COMPRISES THE STEPS OF DISPERSING FINELY DIVIDED PYRRHOTITIC MINERAL SULPHIDE PARTICLES WHICH CONTAIN NONFERROUS METAL VALUES IN AN AQUEOUS MEDIUM SELECTED FROM THE GROUP CONSISTING OF WATER AND AQUEOUS SULPHURIC ACID SOLUTION TO FORM A SLURRY, REACTING THE SLURRY IN A REACTION ZONE AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 200* F. TO THE MELTING TEMPERATURE OF SULPHUR AND UNDER A PARTIAL PRESSURE OF OXYGEN ABOVE 5 POUNDS PER SQUARE INCH, FEEDING A FREE OXYGEN BEARING, OXIDIZING GAS INTO THE REACTION ZONE, ACTIVELY AGITATING THE SLURRY AND CONTINUING THE REACTION TO OXIDIZE SULPHIDE SULPHUR IN THE PYRRHOTITIC MATERIAL TO ELEMENTAL SULPHUR, INCREASING THE TEMPERATURE TO A TEMPERATURE ABOVE THE MELTING TEMPERATURE OF SULPHUR WHEREBY ELEMENTAL SULPHUR IS AGGLOMERATED INTO LIQUID SULPHUR GLOBULES AND NON-FERROUS METAL VALUES ARE SIMULTANEOUSLY ATTACHED TO LIQUID SULPHUR GLOBULES, COOLING THE SLURRY TO A TEMPERATURE BELOW THE MELTING TEMPERATURE OF SULPHUR AND THEREBY SOLIDIFYING THE LIQUID SULPHUR GLOBULES TO FORM SOLID SULPHUR PELLETS WITH COHERING NON-FERROUS METAL VALUES, SEPARATING SULPHUR PELLETS FROM THE SLURRY, AND SEPARATING AND RECOVERING NON-FERROUS METAL VALUES FROM THE SULPHUR PELLETS.
Claim 2
Independent Claim
203 words
THE METHOD OF PRODUCING ELEMENTAL SULPHUR AND OF RECOVERING NON-FERROUS METAL VALUES FROM PYRRHOTITIC MINERAL SULPHIDES WHICH CONTAIN NON-FERROUS METAL VALUES WHICH COMPRISES THE STEPS OF DISPERSING FINELY DIVIDED PYRRHOTITIC MINERAL SULPHIDE PARTICLES WHICH CONTAIN NONFERROUS METAL VALUES IN AN AQUEOUS MEDIUM SELECTED FROM THE GROUP CONSISTING OF WATER AND AQUEOUS SULPHURIC ACID SOLUTION TO FORM A SLURRY, REACTING THE SLURRY IN A REACTION ZONE AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 200* F. TO THE MELTING TEMPERATURE OF SULPHUR AND UNDER A PARTIAL PRESSURE OF OXYGEN ABOVE 5 POUNDS PER SQUARE INCH, FEEDING A FREE OXYGEN BEARING, OXIDIZING GAS INTO THE REACTION ZONE, ACTIVELY AGITATING THE SLURRY AND CONTINUING THE REACTION TO OXIDIZE SULPHIDE SULPHUR IN THE PYRRHOTITIC MATERIAL TO ELEMENTAL SULPHUR, INCREASING THE TEMPERATURE TO A TEMPERATURE ABOVE THE MELTING TEMPERATURE OF SULPHUR WHEREBY ELEMENTAL SULPHUR IS AGGLOMERATED INTO LIQUID SULPHUR GLOBULES AND NON-FERROUS METAL VALUES ARE SIMULTANEOUSLY ATTACHED TO LIQUID SULPHUR GLOBULES, COOLING THE SLURRY TO A TEMPERATURE BELOW THE MELTING TEMPERATURE OF SULPHUR AND THEREBY SOLIDIFYING THE LIQUID SULPHUR GLOBULES TO FORM SOLID SULPHUR PELLETS WITH COHERING NON-FERROUS METAL VALUES, SEPARATING SULPHUR PELLETS FROM THE SLURRY, AND SEPARATING AND RECOVERING NON-FERROUS METAL VALUES FROM 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 |