US2558508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thiphene production from hydrogen sulfide and mono-olefin
Assignee: Shell Development Co
•
Filing: 1946-06-17
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Granted: 1951-06-26
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Expires: 1966-06-17
Abstract
No abstract record available.
Inventors
- 👤 Walter G Appleby
- 👤 Albin F Sartor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:28
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/02; C07D333/04; C07D333/06; C07D333/08; C07D333/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
THE PROCESS FOR THE PRODUCTION OF THIOPHENE WHICH CONSISTS OF CONTACTING A MIXTURE OF BUTYLENE AND HYDROGEN SULFIDE CONTAINING A MOLAR RATIO OF HYDROGEN SULFIDE TO BUTYLENE OF FROM ABOUT 2:1 TO ABOUT 6:1 WITH IRON SULFIDE AT A TEMPERATURE OF ABOUT 550* TO ABOUT 800* C. IN A REACTION ZONE FOR A TIME BETWEEN 10 AND 30 SECONDS, THEREBY REACTING HYDROGEN SULFIDE WITH BUTYLENE WITH THE FORMATION OF THIOPHENE IN SAID REACTION ZONE, SEPARATING THIOPHENE AND UNCONVERTED HYDROGEN SULFIDE FROM THE RESULTING REACTION PRODUCTS AND RECYCLING SAID UNCOVERTED HYDROGEN FULFIDE TO SAID REACTION ZONE.
Claim 2
Dependent Claim
95 words
THE PROCESS FOR THE PRODUCTION OF THIOPHENE WHICH CONSISTS OF CONTACTING A MIXTURE OF BUTYLENE AND HYDROGEN SULFIDE CONTAINING A MOLAR RATIO OF HYDROGEN SULFIDE TO BUTYLENE OF FROM ABOUT 2:1 TO ABOUT 6:1 WITH IRON SULFIDE AT A TEMPERATURE OF ABOUT 550* TO ABOUT 800* C. IN A REACTION ZONE FOR A TIME BETWEEN 10 AND 30 SECONDS, THEREBY REACTING HYDROGEN SULFIDE WITH BUTYLENE WITH THE FORMATION OF THIOPHENE IN SAID REACTION ZONE, SEPARATING THIOPHENE AND UNCONVERTED HYDROGEN SULFIDE FROM THE RESULTING REACTION PRODUCTS AND RECYCLING SAID UNCOVERTED HYDROGEN FULFIDE TO SAID REACTION ZONE.
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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) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |