Patent US3781377A successfully refreshed from Google Patents.
US3781377A
Expired / Lapsed
US
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Isomerization of neohexene
Assignee: Phillips Petroleum Co
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Filing: 1971-12-06
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Granted: 1973-12-25
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Expires: 1991-12-06
Abstract
Abstract NEOHEXENE IS SKELETALLY ISOMERIZED TO 2,3-DIMETHYLBUTENE-2 WITH EXCELLENT SELECTIVITY AND CONVERSION UTILIZING AN ALUMINA CATALYST CONTAINING 0.1 TO 0.2 WEIGHT PERCENT SODIUM OXIDE AND HAVING A SURFACE AREA OF 150 TO 180 SQUARE METERS PER GRAM. 2,3-DIMETHYLBUTENE-1 PRODUCED IN THE REACTION IS DOUBLE BOND-ISOMERIZED TO PROVIDE ADDITIONAL 2,3-DEMETHYLBUTENE-2. WHERE THE NEOHEXENE IS PRODUCED BY DISPROPORTIONATION OF 2,4,4-TRIMETHYLPENTENE-2 AND ETHYLENE, A DIMETHYLBUTENE-1 FRACTION CONTAINING METHYLPENTENES FROM THE SECOND ISOMERIZATION STEP CAN BE ADVANTAGEOUSLY FED TO THE DISPROPORTIONATION CATALYST ZONE, THEREBY ELIMINATING THE PROBLEM OF SEPARATING THE METHYLPENTENES.
Inventors
- 👤 J Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:27
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/02; C07C11/107; C07C5/00; C07C5/22; C07C5/27; C07C5/2729; C07C5/2732; C07C5/2735; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/905; Y10S585/906
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |