US3558733A
Expired / Lapsed
US
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Olefin isomerization process with alumina of controlled water content
Assignee: Phillips Petroleum Co
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Filing: 1969-07-30
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Granted: 1971-01-26
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Expires: 1989-07-30
Abstract
Abstract ALUMINA CATALYST ARE ACTIVATED AT 600 TO 900*F. FOR INCREASED SKELETAL ISOMERIZATION OF N-BUTENES. FURTHER THESE CATALYSTS ARE USED IN A VERSATILE BLOCKED PROCESS FOR SKELETAL ISOMERIZATION OF BOTH N-BUTENES AND HIGHER NOLEFINS. THE CATALYSTS CAN BE ACTIVATED AT 1100 TO 1400* F. FOR THE SKELETAL ISOMERIZATION OF HIGHER N-OLEFINS AND SUBSEQUENTLY EXPOSED TO MOISTURE AND REACTIVATED AT 600 TO 900*F. FOR N-BUTENES. ALTERNATIVELY, THE REACTION FOR THE N-BUTENES CAN BE OBTAINED BY ADDING A CONTROLLED AMOUNT OF WATER TO THE CATALYST. OPTIONALLY, THE CATALYST CAN BE FIRST ACTIVATED FOR N-BUTENES, AND SUBSEQUENTLY PREPARED FOR THE HIGHER N-OLEFINS BY REACTIVATING AT 1000 TO 1400*F.
Inventors
- 👤 John W Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:38
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2767; C07C5/277; C07C5/2772; B; B01; B01J; B01J21/00; B01J21/02; B01J21/04; B01J21/20; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |