US3034864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfur recovery
Assignee: Viridian Inc Canada
•
Filing: 1953-05-11
•
Granted: 1962-05-15
•
Expires: 1973-05-11
Abstract
No abstract record available.
Inventors
- 👤 Frank A Forward
- 👤 Odle Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:44
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
170 words
THE METHOD OF PRODUCING ELEMENTAL SULPHUR WHICH COMPRISES THE STEPS OF DISPERSING PYRRHOTITIC MINERAL SULPHIDE PARTICLES OF A SIZE WITHIN THE RANGE OF FROM ABOUT 35 TO ABOUT 325 MESH STANDARD TYLER SCREEN IN AN AQUEOUS MEDIUM OF THE GROUP CONSISTING OF WATER AND AQUEOUS SULPHURIC ACID SOLUTION TO FORM A SLURRY, REACTING THE AQUEOYS SLURRY WITH A FREE OXYGEN BEARING, OXIDIZING GAS AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 200* TO ABOUT 290*F. AND UNDER A PARTIAL PRESSURE OXYGEN ABOVE ABOUT 25 POUNDS PER SQUARE INCH, CONTINUING THE OXIDATION STEP FOR A PERIOD OF TIME SUFFICIENT TO CONVERT SULPHIDE SULPHUR CONTAINED IN THEE PYRRHOTITIC MINERAL SULPHIDES TO ELEMENTAL SULPHUR, CONDUCTING AT LEAST PART OF THE TREATMENT AT A TEMPERATURE ABOVE THE MELTING TEMPERATURE OF SULPHUR TO AGGLOMERATE ELEMENTAL SULPHUR INTO LIQUID SULPHUR GLOBULES, COOLING THE SLURRY TO A TEMPERATURE BELOW THE MELTING TEMPERATURE OF SULPHUR TO SOLDIIFY THE LIQUID SULPHUR GLOBULES AND FORM SOLID SULPHUR PELLETS, AND SEPARATING ANS RECOVERING SOLIDIFIED ELEMENTAL SULPHUR PELLETS FROM THE SLURRY.
Claim 2
Independent Claim
170 words
THE METHOD OF PRODUCING ELEMENTAL SULPHUR WHICH COMPRISES THE STEPS OF DISPERSING PYRRHOTITIC MINERAL SULPHIDE PARTICLES OF A SIZE WITHIN THE RANGE OF FROM ABOUT 35 TO ABOUT 325 MESH STANDARD TYLER SCREEN IN AN AQUEOUS MEDIUM OF THE GROUP CONSISTING OF WATER AND AQUEOUS SULPHURIC ACID SOLUTION TO FORM A SLURRY, REACTING THE AQUEOYS SLURRY WITH A FREE OXYGEN BEARING, OXIDIZING GAS AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 200* TO ABOUT 290*F. AND UNDER A PARTIAL PRESSURE OXYGEN ABOVE ABOUT 25 POUNDS PER SQUARE INCH, CONTINUING THE OXIDATION STEP FOR A PERIOD OF TIME SUFFICIENT TO CONVERT SULPHIDE SULPHUR CONTAINED IN THEE PYRRHOTITIC MINERAL SULPHIDES TO ELEMENTAL SULPHUR, CONDUCTING AT LEAST PART OF THE TREATMENT AT A TEMPERATURE ABOVE THE MELTING TEMPERATURE OF SULPHUR TO AGGLOMERATE ELEMENTAL SULPHUR INTO LIQUID SULPHUR GLOBULES, COOLING THE SLURRY TO A TEMPERATURE BELOW THE MELTING TEMPERATURE OF SULPHUR TO SOLDIIFY THE LIQUID SULPHUR GLOBULES AND FORM SOLID SULPHUR PELLETS, AND SEPARATING ANS RECOVERING SOLIDIFIED ELEMENTAL SULPHUR PELLETS FROM THE SLURRY.
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) | 1965-05-14 | 1965-11-13 | 1966-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-14 | 1969-11-13 | 1970-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-14 | 1973-11-13 | 1974-05-15 | $7700.00 | Window Closed / Lapsed |