US3880944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friedel-Crafts reaction with graphite intercalated Lewis acids
Assignee: Ventron Corp
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Filing: 1973-11-13
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Granted: 1975-04-29
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Expires: 1993-11-13
Abstract
Abstract Improved synthesis of hydrocarbons of mixed type by the FriedelCrafts hydrocarbon synthesis is obtained by using a graphite intercalated Lewis acid selected from aluminum trichloride, aluminum tribromide and ferric chloride whereby a greater proportion of mono- and disubstituted hydrocarbon is obtained than using the Lewis acid alone.
Inventors
- 👤 Jean-Marc Lalancette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:54
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/86; C07C2/861; B; B01; B01J; B01J27/00; B01J27/06; B01J31/00; B01J31/16; B01J31/1616; C07C2/54; C07C2/64; C07C2/66; C07C2/68; B01J2231/00; B01J2231/40; B01J2231/42; B01J2231/4205; B01J2531/00; B01J2531/30; B01J2531/31; C07C2521/00; C07C2521/18; C07C2527/00; C07C2527/06; C07C2527/125; C07C2527/126; C07C2527/128
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
82 words
IN A PROCESS FOR THE SYNTHESIS OF SUBSTITUTED AROMATIC HYDROCARBON BY THE REACTION OF AN UNSATURATED ALIPHATIC HYDROCARBON OR A HALOGENATED ALIPHATIC HYDROCARBON WITH AN AROMATIC HYDROCARBON, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE REACTION IN THE PRESENCE OF A GRAPHITE INTERCALATED LEWIS ACID SELECTED FROM THE GROUP CONSISTING OF ALUMINUM CHLORIDE, ALUMINUM TRIBROMIDE AND FERRIC CHLORIDE THEREBY TO YIELD A REACTION MIXTURE CONTAINING A HIGHER PERCENTAGE OF MONO AND DISUBSTITUTED AROMATIC HYDROCARBON THAN IS OBTAINED WHEN USING THE LEWIS ACID ALONE.
Claim 2
Dependent Claim
82 words
IN A PROCESS FOR THE SYNTHESIS OF SUBSTITUTED AROMATIC HYDROCARBON BY THE REACTION OF AN UNSATURATED ALIPHATIC HYDROCARBON OR A HALOGENATED ALIPHATIC HYDROCARBON WITH AN AROMATIC HYDROCARBON, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE REACTION IN THE PRESENCE OF A GRAPHITE INTERCALATED LEWIS ACID SELECTED FROM THE GROUP CONSISTING OF ALUMINUM CHLORIDE, ALUMINUM TRIBROMIDE AND FERRIC CHLORIDE THEREBY TO YIELD A REACTION MIXTURE CONTAINING A HIGHER PERCENTAGE OF MONO AND DISUBSTITUTED AROMATIC HYDROCARBON THAN IS OBTAINED WHEN USING THE LEWIS ACID ALONE.
Claim 3
Dependent Claim
34 words
The process of claim 1, wherein the reaction is carried out in the presence of aluminum trichloride intercalated in graphite, the amount of aluminum trichloride being up to about 35% by weight of graphite.
Claim 4
Dependent Claim
34 words
The process of claim 1, wherein the reaction is carried out in the presence of aluminum tribromide intercalated in graphite, the amount of aluminum tribromide being up to about 35% by weight of graphite.
Claim 5
Dependent Claim
38 words
The process of claim 1 wherein the aromatic hydrocarbon is reacted with an alkene having two to 18 carbon atoms or an alkyl halide having two to five carbon atoms and wherein the halogen is chlorine or bromine.
Claim 6
Dependent Claim
16 words
The process of claim 4, wherein the aromatic hydrocarbon is benzene, toluene, xylene, naphthalene or biphenyl.
Claim 7
Dependent Claim
20 words
The process of claim 5 wherein the alkene is ethylene, propylene or isobutylene and the alkyl halide is ethyl bromide.
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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |