US2910514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of durene from fractions containing polyalkyl benzenes having 9 to 10 carbon atoms per molecule
Assignee: California Research LLC
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Filing: 1955-08-12
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Granted: 1959-10-27
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Expires: 1975-08-12
Abstract
No abstract record available.
Inventors
- 👤 Jr John W Scott
- 👤 Raymond V Luthy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:37
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/08; C07C6/12; C07C6/123
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A METHOD FOR CONVERTING POLYALKYL BENZENES CONTAINING FROM 9 TO 10 CARBON ATOMS IN THEMOLECULE TO DURENE, WHICH COMPRISES CONTACTING A HYDROCARBON FEED CONTAINING SAID POLYALKYL BENZENES WITH A CATALYST HAVING A HYDROGENATING-DEHYDROGENATING COMPONENT DISPOSED ON AN ACTIVE CRACKING CATALYST SUPPORT IN THE PRESENCE OF FROM ABOUT 1000 TO 10,000 S.C.F. H2 PER BARREL OF FEED AT A TEMPERATURE BETWEEN ABOUT 650 AND 850* F., A PRESSURE ABOVE 300 P.S.I.G. AND A SPACE RATE OF FROM ABOUT 0.5 TO 15 V./V./HR., AND RECOVERING DURENE FROM THE RESULTING REACTION MIXTURE.
Claim 2
Independent Claim
89 words
A METHOD FOR CONVERTING POLYALKYL BENZENES CONTAINING FROM 9 TO 10 CARBON ATOMS IN THEMOLECULE TO DURENE, WHICH COMPRISES CONTACTING A HYDROCARBON FEED CONTAINING SAID POLYALKYL BENZENES WITH A CATALYST HAVING A HYDROGENATING-DEHYDROGENATING COMPONENT DISPOSED ON AN ACTIVE CRACKING CATALYST SUPPORT IN THE PRESENCE OF FROM ABOUT 1000 TO 10,000 S.C.F. H2 PER BARREL OF FEED AT A TEMPERATURE BETWEEN ABOUT 650 AND 850* F., A PRESSURE ABOVE 300 P.S.I.G. AND A SPACE RATE OF FROM ABOUT 0.5 TO 15 V./V./HR., AND RECOVERING DURENE FROM THE RESULTING REACTION MIXTURE.
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) | 1962-10-26 | 1963-04-27 | 1963-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-26 | 1967-04-27 | 1967-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-26 | 1971-04-27 | 1971-10-27 | $7700.00 | Window Closed / Lapsed |