Patent US3681024A successfully refreshed from Google Patents.
US3681024A
Expired / Lapsed
US
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Method for production of sulfur from hydrogen sulfide using oxygen
Assignee: BP America Production Co
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Filing: 1970-08-10
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Granted: 1972-08-01
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Expires: 1990-08-10
Abstract
Abstract THE VOLUME OF SULFUR PLANT EFFLUENT DISCHARGED TO THE ATMOSPHERE IS MATERIALLY DECREASED BY THE USE OF SUBSTANTIALLY PURE OXYGEN RATHER THAN AIR DOWN STREAM FROM THE REACTOR(S). THE UNCONDENSED FRACTION SEPARATED FROM THE PRODUCT SULFUR IS SUBJECTED TO A CONDENSING OR QUENCHING STEP WHERE ANY FREE SULFUR VAPORS PRESENT IN SUCH FRACTION ARE REMOVED FROM THE SYSTEM. THE PORTION OF THE FRACTION ARE REMOVED FROM THE SYSTEM. THE PORTION OF THE FRACTION WHICH REMAINS UNCONDENSED IS SPLIT INTO TWO STREAMS, THE LARGER ONE OF WHICH IS RECYCLED TO THE FURNACE, AND THE SMALLER ONE PURGED TO THE ATMOSPHERE.
Inventors
- 👤 Karol L Hujsak
- 👤 John W Palm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:24
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B17/0404; C01B17/0447
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |