US2690961A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical manufacture
Assignee: Sinclair Refining Co
•
Filing: 1951-05-19
•
Granted: 1954-10-05
•
Expires: 1971-05-19
Abstract
No abstract record available.
Inventors
- 👤 Carl D Keith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:27
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B17/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN THE RECOVERY OF ELEMENTAL SULFUR FROM A HYDROGEN SULFIDE-RICH GAS STREAM, THE METHOD WHICH COMPRISES PARTIALLY OXIDIZING HYDROGEN SULFIDE WITH AIR TO PRODUCE A MIXTURE OF HYDROGEN SULFIDE AND SULFUR DIOXIDE IN THE GAS STREAM IN THE APPROXIMATE RATIO OF 2 TO 1, COOLING THE GAS STREAM BY PASSING IT THROUGH A MOLTEN SULFUR REACTOR IN INDIRECT HEAT TRANSFER WITH THE REACTANTS THEREIN, ADJUSTING THE TEMPERATURE OF THE GAS STREAM TO ABOUT 100* TO 150* F., REACTING THE MIXTURE OF HYDROGEN SULFIDE AND SULFUR DIOXIDE IN AQUEOUS MEDIUM AT A TEMPERATURE OF ABOUT 70* TO 130* F. IN A SECOND REACTION VESSEL, WITHDRAWING THE AQUEOUS REACTION MIXTURE FROM THE SECOND REACTION VESSEL AND REACTING IT IN THE MOLTEN SULFUR REACTOR IN THE LIQUID PHASE AT A TEMPERATURE OF ABOUT 250* TO 350* F. AND RECOVERING MOLTEN SULFUR FROM THE LIQUID REACTION PHASE.
Claim 2
Dependent Claim
143 words
IN THE RECOVERY OF ELEMENTAL SULFUR FROM A HYDROGEN SULFIDE-RICH GAS STREAM, THE METHOD WHICH COMPRISES PARTIALLY OXIDIZING HYDROGEN SULFIDE WITH AIR TO PRODUCE A MIXTURE OF HYDROGEN SULFIDE AND SULFUR DIOXIDE IN THE GAS STREAM IN THE APPROXIMATE RATIO OF 2 TO 1, COOLING THE GAS STREAM BY PASSING IT THROUGH A MOLTEN SULFUR REACTOR IN INDIRECT HEAT TRANSFER WITH THE REACTANTS THEREIN, ADJUSTING THE TEMPERATURE OF THE GAS STREAM TO ABOUT 100* TO 150* F., REACTING THE MIXTURE OF HYDROGEN SULFIDE AND SULFUR DIOXIDE IN AQUEOUS MEDIUM AT A TEMPERATURE OF ABOUT 70* TO 130* F. IN A SECOND REACTION VESSEL, WITHDRAWING THE AQUEOUS REACTION MIXTURE FROM THE SECOND REACTION VESSEL AND REACTING IT IN THE MOLTEN SULFUR REACTOR IN THE LIQUID PHASE AT A TEMPERATURE OF ABOUT 250* TO 350* F. AND RECOVERING MOLTEN SULFUR FROM THE LIQUID REACTION PHASE.
References Cited (Backward Citations)
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US1832448A
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US1904424A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-04 | 1958-04-05 | 1958-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-04 | 1962-04-05 | 1962-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-04 | 1966-04-05 | 1966-10-05 | $7700.00 | Window Closed / Lapsed |