US2576535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treating olefins with alkanesulfonic acid
Assignee: Standard Oil Co
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Filing: 1948-02-10
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Granted: 1951-11-27
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Expires: 1968-02-10
Abstract
No abstract record available.
Inventors
- 👤 Wayne A Proell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:37
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/14875
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
THE METHOD OF UTILIZING SELECTIVE ESTERIFICATION OF A SECONDARY OLEFIN WITH ALKANESULFONIC ACID TO EFFECT REMOVAL OF SAID SECONDARY OLEFIN FROM A HYDROCARBON STREAM CONTAINING SAID SECONDARY OLEFIN AND ALSO CONTAINING ETHYLENE, WHICH METHOD COMPRISES CONTACTING SAID STREAM AT A TEMPERATURE ABOVE 40* F. BUT BELOW 140* F. WITH AN ALKANESULFONIC ACID CONTAINING NOT MORE THAN 5 CARBON ATOMS PER MOLECULE AND HAVING AN ACID CONCENTRATION HIGHER THAN 80%, EMPLOYING A TIME OF CONTACT OF ABOUT 10 MINUTES TO ABOUT 60 MINUTES SUFFICIENT TO EFFECT REACTION OF SAID SECONDARY OLEFIN WITH ALKANESULFONIC ACID TO FORM AN ALKENSULFONIC ACID ESTER PHASE, AND REMOVING FROM THE ACID-ESTER PHASE UNREACTED ETHYLENE WHICH IS SUBSTANTIALLY FREE FROM SECONDARY OLEFIN.
Claim 2
Independent Claim
115 words
THE METHOD OF UTILIZING SELECTIVE ESTERIFICATION OF A SECONDARY OLEFIN WITH ALKANESULFONIC ACID TO EFFECT REMOVAL OF SAID SECONDARY OLEFIN FROM A HYDROCARBON STREAM CONTAINING SAID SECONDARY OLEFIN AND ALSO CONTAINING ETHYLENE, WHICH METHOD COMPRISES CONTACTING SAID STREAM AT A TEMPERATURE ABOVE 40* F. BUT BELOW 140* F. WITH AN ALKANESULFONIC ACID CONTAINING NOT MORE THAN 5 CARBON ATOMS PER MOLECULE AND HAVING AN ACID CONCENTRATION HIGHER THAN 80%, EMPLOYING A TIME OF CONTACT OF ABOUT 10 MINUTES TO ABOUT 60 MINUTES SUFFICIENT TO EFFECT REACTION OF SAID SECONDARY OLEFIN WITH ALKANESULFONIC ACID TO FORM AN ALKENSULFONIC ACID ESTER PHASE, AND REMOVING FROM THE ACID-ESTER PHASE UNREACTED ETHYLENE WHICH IS SUBSTANTIALLY FREE FROM SECONDARY OLEFIN.
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) | 1954-11-26 | 1955-05-28 | 1955-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-26 | 1959-05-28 | 1959-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-26 | 1963-05-28 | 1963-11-27 | $7700.00 | Window Closed / Lapsed |