US3272886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of normal pentenes
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1963-11-04
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Granted: 1966-09-13
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Expires: 1983-11-04
Abstract
No abstract record available.
Inventors
- 👤 William R Edwards
- 👤 Robert D Wesselhoft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:45
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/17; C07C7/171
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
188 words
A METHOD OF PRODUCING HIGH-PURITY NORMAL PENTENE WHICH COMPRISES CONTACTING A CATALYTIC PENTHYLENE STREAM CONTAINING TERTIARY PENTENES, NORMAL PENTENES, AND C5 PARAFFINS WITH H2SO4 HAVING A WEIGHT CONCENTRATION OF 50% TO 75% AT A TEMPERATURE OF 20*F. TO 70*F. A RATIO OF ACID-TO-HYDROCARBON STREAM OF 10:1 TO 1:10 AND A RESIDENCE TIME OF 0.1 TO 4 HOURS, WHEREBY A TERTIARY PENTYLENE-FREE RAFFINATE IS OBTAINED, CONTACTING SAID RAFFINATE WITH H2SO4 HAVING A CONCENTRATION OF 78 TO 82 WEIGHT PERCENT AT A TEMPERATURE OF 20*F. TO 50*F., A RATIO OF ACID TO FIRST RAFFINATE OF 10:1 TO 1:10, AND A RESIDENCE TIME OF 1 TO 6 HOURS, WHEREBY A NORMAL PENTENE-CONTAINING FAT ACID EXTRACT IS OBTAINED, WASHING SAID FLAT ACID BY CONTACT WITH A WASH HYDROCARBON STREAM AT A TEMPERATURE OF 20*F. TO 50*F., SAID WASH HYDROCARBON BOILING WITHIN A RANGE SUBSTANTIALLY DIFFERENT FROM SAID NORMAL PENTENE, AND INDIRECTLY HEATING SAID WASHED FAT ACID EXTRACT WITHOUT DILUTION TO A FINAL TEMPERATURE OF 275*F. TO 325*F., AND AT A RATE OF AT LEAST 1000*F. PER MINUTE, WHEREBY A SUBSTANTIALLY PURE NORMAL PENTENE STREAM IS OBTAINED WITH ONLY MINIMAL LOSSES TO POLYMER.
Claim 2
Independent Claim
188 words
A METHOD OF PRODUCING HIGH-PURITY NORMAL PENTENE WHICH COMPRISES CONTACTING A CATALYTIC PENTHYLENE STREAM CONTAINING TERTIARY PENTENES, NORMAL PENTENES, AND C5 PARAFFINS WITH H2SO4 HAVING A WEIGHT CONCENTRATION OF 50% TO 75% AT A TEMPERATURE OF 20*F. TO 70*F. A RATIO OF ACID-TO-HYDROCARBON STREAM OF 10:1 TO 1:10 AND A RESIDENCE TIME OF 0.1 TO 4 HOURS, WHEREBY A TERTIARY PENTYLENE-FREE RAFFINATE IS OBTAINED, CONTACTING SAID RAFFINATE WITH H2SO4 HAVING A CONCENTRATION OF 78 TO 82 WEIGHT PERCENT AT A TEMPERATURE OF 20*F. TO 50*F., A RATIO OF ACID TO FIRST RAFFINATE OF 10:1 TO 1:10, AND A RESIDENCE TIME OF 1 TO 6 HOURS, WHEREBY A NORMAL PENTENE-CONTAINING FAT ACID EXTRACT IS OBTAINED, WASHING SAID FLAT ACID BY CONTACT WITH A WASH HYDROCARBON STREAM AT A TEMPERATURE OF 20*F. TO 50*F., SAID WASH HYDROCARBON BOILING WITHIN A RANGE SUBSTANTIALLY DIFFERENT FROM SAID NORMAL PENTENE, AND INDIRECTLY HEATING SAID WASHED FAT ACID EXTRACT WITHOUT DILUTION TO A FINAL TEMPERATURE OF 275*F. TO 325*F., AND AT A RATE OF AT LEAST 1000*F. PER MINUTE, WHEREBY A SUBSTANTIALLY PURE NORMAL PENTENE STREAM IS OBTAINED WITH ONLY MINIMAL LOSSES TO POLYMER.
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |