US2849509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for conversion of alkylbenzenes with a difluorophosphoric acid-bf3 catalyst
Assignee: Standard Oil Co
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Filing: 1955-12-20
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Granted: 1958-08-26
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Expires: 1975-12-20
Abstract
No abstract record available.
Inventors
- 👤 John I Slaughter
- 👤 David A Mccaulay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:32
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/08; C07C6/12; C07C6/123
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A PROCESS FOR THE CATALYST CONVERSION OF ALKYLBENZENES HAVING BETWEEN 1 AND 4 CARBON ATOMS INCLUSIVE IN ANY ONE ALKYL SIDE CHAIN, THE SUM OF THE CARBON ATOMS IN THE TOTAL NUMBER OF SIDE CHAINS BEING AT LEAST 2 CARBON ATOMS PER ALKYLBENZENE MOLECULE, WHICH PROCESS COMPRISES CONTACTING SAID ALKYLBENZENE WITH BETWEEN ABOUT 1 AND 10 VOLUMES OF DIFLUOROPHOSPHORIC ACID PER COLUME OF ALKYLBENZENE IN THE PRESENCE OF A PARTIAL PRESSURE OF BF3 OF BETWEEN ABOUT 100 AND 5000 P. S. I. G. AT A TEMPERATURE BETWEEN ABOUT 0* AND 300*F. FOR A PERIOD OF TIME BETWEEN ABOUT 20 HOURS AND 1 MINUTE, THE LONGER TIMES CORRESPONDING TO THE LOWER TEMPERATURES, REMOVING BF3 FROM CONTACT WITH THE HYDROCARBONS AND ACID, SEPARATING AN ACID PHASE FROM A HYDROCARBON PHASE, AND RECOVERING CONVERTED ALKYLBENZENES FROM SAID HYDROCARBON PHASE.
Claim 2
Dependent Claim
136 words
A PROCESS FOR THE CATALYST CONVERSION OF ALKYLBENZENES HAVING BETWEEN 1 AND 4 CARBON ATOMS INCLUSIVE IN ANY ONE ALKYL SIDE CHAIN, THE SUM OF THE CARBON ATOMS IN THE TOTAL NUMBER OF SIDE CHAINS BEING AT LEAST 2 CARBON ATOMS PER ALKYLBENZENE MOLECULE, WHICH PROCESS COMPRISES CONTACTING SAID ALKYLBENZENE WITH BETWEEN ABOUT 1 AND 10 VOLUMES OF DIFLUOROPHOSPHORIC ACID PER COLUME OF ALKYLBENZENE IN THE PRESENCE OF A PARTIAL PRESSURE OF BF3 OF BETWEEN ABOUT 100 AND 5000 P. S. I. G. AT A TEMPERATURE BETWEEN ABOUT 0* AND 300*F. FOR A PERIOD OF TIME BETWEEN ABOUT 20 HOURS AND 1 MINUTE, THE LONGER TIMES CORRESPONDING TO THE LOWER TEMPERATURES, REMOVING BF3 FROM CONTACT WITH THE HYDROCARBONS AND ACID, SEPARATING AN ACID PHASE FROM A HYDROCARBON PHASE, AND RECOVERING CONVERTED ALKYLBENZENES FROM SAID HYDROCARBON PHASE.
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) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |