Patent US3255273A successfully refreshed from Google Patents.
US3255273A
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Heptene manufacture process
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1965-04-30
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Granted: 1966-06-07
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Expires: 1985-04-30
Abstract
No abstract record available.
Inventors
- 👤 William E Catterall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:48
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/14; C07C2/18; C07C2521/00; C07C2521/06; C07C2521/08; C07C2527/00; C07C2527/14; C07C2527/16; C07C2527/167; C07C2527/173; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/954
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN A PROCESS FOR PREPARING A C7 OLEFIN FROM A C3 TO C4 HYDROCARBON STREAM CONTAINING AT LEAST 20 MOLE PERCENT OLEFIN AND CONSISTING ESSENTIALLY OF PROPYLENE AND NBUTYLENES WHEREIN SAID STREAM IS CONTACTED WITH A PHOSPHORIC ACID CATALYST AT THE RATE OF ABOUT 0.05 TO 0.5 GALLONS PER HOUR PER POUND OF CATALYST IN A POLYMERIZATION ZONE AT TEMPERATURES OF 280* TO 550*F. AND PRESSURES OF 250 TO 3000 P.S.I.G. TO PRODUCE SAID C7 LEFIN, THE IMPROVEMENT WHICH COMSISTS OF ADDING TO SAID STREAM BETWEEN ABOUT 0.15 TO 3 MOLES OF DIISOBUTYLENE (CALCULATED AS EQUIVALENT ISOBUTYLENE) PER MOLE OF PROPYLENE, THEREBY SUBSTANTIALLY INCREASING THE YIELD OF SAID C7 OLEFIN.
Claim 2
Dependent Claim
110 words
IN A PROCESS FOR PREPARING A C7 OLEFIN FROM A C3 TO C4 HYDROCARBON STREAM CONTAINING AT LEAST 20 MOLE PERCENT OLEFIN AND CONSISTING ESSENTIALLY OF PROPYLENE AND NBUTYLENES WHEREIN SAID STREAM IS CONTACTED WITH A PHOSPHORIC ACID CATALYST AT THE RATE OF ABOUT 0.05 TO 0.5 GALLONS PER HOUR PER POUND OF CATALYST IN A POLYMERIZATION ZONE AT TEMPERATURES OF 280* TO 550*F. AND PRESSURES OF 250 TO 3000 P.S.I.G. TO PRODUCE SAID C7 LEFIN, THE IMPROVEMENT WHICH COMSISTS OF ADDING TO SAID STREAM BETWEEN ABOUT 0.15 TO 3 MOLES OF DIISOBUTYLENE (CALCULATED AS EQUIVALENT ISOBUTYLENE) PER MOLE OF PROPYLENE, THEREBY SUBSTANTIALLY INCREASING THE YIELD OF SAID C7 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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |