US3248443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for alkylating aromatic hydrocarbons
Assignee: Monsanto Co
•
Filing: 1963-01-31
•
Granted: 1966-04-26
•
Expires: 1983-01-31
Abstract
No abstract record available.
Inventors
- 👤 Gilbert J Mcewan
- 👤 Sidney G Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:52
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/68; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1213; C07C2527/125; C07C2527/126; C07C2531/00; C07C2531/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
IN AN ALKYLATION PROCESS FOR PRODUCING STRAINGT CHAIN ALKYL ARYL COMPOUNDS WHEREIN THE AROMATIC NUCLEI OF THE AROMATIC COMPOUNDS ARE ALKYLATED USING STRAIGHT CHAIN OLEFINS, THE IMPROVEMENT WHICH COMPRISES ALKYLATING STRAIGHT CHAIN OLEFINS CONTAINING NOT MORE THAN ABOUT 50% BY WEIGHT OF ALPHA OLEFINS WITH AROMATIC COMPOUNDS IN THE PRESENCE OF ALKYLATION CATALYST COMBINATION OF A FRIEDEL-CRAFTS CATALYST SELECTED FROM THE CLASS CONSISTING OF ACTIVATED ALUMINUM CHLORIDE, ACTIVATED ALUMINUM BROMIDE, AND BORON TRIFLUORIDE, AND AN ORGANO-NITRO CATALYST MODIFIER, SAID ALKYLATION CONDUCTED WITH A CATALYST COMBINATION TO OLEFIN MOLAR OF AT LEAST ABOUT 2:1, WHEREBY THE RESULTING STRAIGHT CHAIN ALKYL ARYL COMPOUNDS CONTAIN A RELATIVELY LOW PROPORTION OF THE ISOMER WHEREIN THE ARYL NUCLEUS IN ATTACHED AT THE TWO POSITION OF THE ALKYL CHAIN.
Claim 2
Dependent Claim
123 words
IN AN ALKYLATION PROCESS FOR PRODUCING STRAINGT CHAIN ALKYL ARYL COMPOUNDS WHEREIN THE AROMATIC NUCLEI OF THE AROMATIC COMPOUNDS ARE ALKYLATED USING STRAIGHT CHAIN OLEFINS, THE IMPROVEMENT WHICH COMPRISES ALKYLATING STRAIGHT CHAIN OLEFINS CONTAINING NOT MORE THAN ABOUT 50% BY WEIGHT OF ALPHA OLEFINS WITH AROMATIC COMPOUNDS IN THE PRESENCE OF ALKYLATION CATALYST COMBINATION OF A FRIEDEL-CRAFTS CATALYST SELECTED FROM THE CLASS CONSISTING OF ACTIVATED ALUMINUM CHLORIDE, ACTIVATED ALUMINUM BROMIDE, AND BORON TRIFLUORIDE, AND AN ORGANO-NITRO CATALYST MODIFIER, SAID ALKYLATION CONDUCTED WITH A CATALYST COMBINATION TO OLEFIN MOLAR OF AT LEAST ABOUT 2:1, WHEREBY THE RESULTING STRAIGHT CHAIN ALKYL ARYL COMPOUNDS CONTAIN A RELATIVELY LOW PROPORTION OF THE ISOMER WHEREIN THE ARYL NUCLEUS IN ATTACHED AT THE TWO POSITION OF THE ALKYL CHAIN.
References Cited (Backward Citations)
US2734930A
Cited
US2363824A
Cited
US2403672A
Cited
US2404340A
Cited
US2631172A
Cited
US2712530A
Cited
US2695326A
Cited
US2761000A
Cited
US2965689A
Cited
US3169987A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |