Patent US4192824A successfully refreshed from Google Patents.
US4192824A
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Aromatic hydrocarbon resins
Assignee: Coal Industry Patents Ltd
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Filing: 1979-01-09
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Granted: 1980-03-11
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Expires: 1999-01-09
Abstract
Abstract A method of producing a condensation product by reacting together an aromatic hydrocarbon with a carbonyl compound having more than one carbon atom (therefore excluding formaldehyde) in the presence of aluminium chloride or bromide, at a temperature of from 5 DEG to 90 DEG C. The aluminium chloride or bromide should be substantially anhydrous. The aromatic hydrocarbon should be mono- or bi-nuclear and may be alkylated. The carbonyl compound may be an aldehyde or a betone and may be albyl or aryl.
Inventors
- 👤 Joseph G. Robinson
- 👤 David I. Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:15
CPC Classifications
C; C08; C08G; C08G10/00; C07; C07C; C07C2/00; C07C2/86; C07C2/862; C07C2/867; C07C2527/00; C07C2527/06; C07C2527/125; C07C2527/126
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
90 words
A method or producing an aromatic hydrocarbon-carbonyl compound condensation product, consisting essentially of the step of reacting at a temperature of from 5 ° to 90° C. in the presence of aluminum chloride or bromide a mixture containing as reacting components only a mono- or bi-nuclear aromatic hydrocarbon selected from the group consisting of toluene, naphthalene, xylene, alkylbenzene, polyalkyl benzene, alkyl naphthalene and polyalkyl naphthalene wherein the alkyl group is not highly branched and contains up to six carbon atoms and a carbonyl compound having more than one carbon atom.
Claim 2
Independent Claim
90 words
A method or producing an aromatic hydrocarbon-carbonyl compound condensation product, consisting essentially of the step of reacting at a temperature of from 5 ° to 90° C. in the presence of aluminum chloride or bromide a mixture containing as reacting components only a mono- or bi-nuclear aromatic hydrocarbon selected from the group consisting of toluene, naphthalene, xylene, alkylbenzene, polyalkyl benzene, alkyl naphthalene and polyalkyl naphthalene wherein the alkyl group is not highly branched and contains up to six carbon atoms and a carbonyl compound having more than one carbon atom.
Claim 3
Dependent Claim
15 words
A method according to claim 1, in which the aromatic hydrocarbon is toluene or naphthalene.
Claim 4
Dependent Claim
23 words
A method according to claim 1, in which the carbonyl compound is selected from the group consisting of propionaldehyde, isobutyraldehyde, benzaldehyde and acetone.
Claim 5
Dependent Claim
22 words
A method according to claim 1, in which the molar ratio of aluminium chloride or bromide to carbonyl compound is about 1.1:1.
Claim 6
Dependent Claim
20 words
A method according to claim 1, in which the molar ratio of carbonyl compound to aromatic hydrocarbon is about 0.5:1.
Claim 7
Dependent Claim
22 words
A method according to claim 1, in which the reaction is carried out at a temperature of from 40° to 90° C.
Claim 8
Dependent Claim
24 words
A method according to claim 1, and including the step of terminating the reaction by adding the reaction mixture to an excess of water.
Claim 9
Independent Claim
77 words
A method of producing an aromatic hydrocarbon-aldehyde condensation product consisting essentially of the step of heating at a temperature of from 70 ° to 90° C. a mixture of propionaldehyde and a mono- or bi-nuclear aromatic hydrocarbon selected from the group consisting of toluene, naphthalene, xylene, alkylbenzene, polyalkyl benzene, alkyl naphthalene and polyalkyl naphthalene wherein the alkyl group is not highly branched and contains up to six carbon atoms in the presence of substantially anhydrous aluminium chloride.
Claim 10
Independent Claim
77 words
A method of producing an aromatic hydrocarbon-aldehyde condensation product consisting essentially of the step of heating at a temperature of from 70 ° to 90° C. a mixture of propionaldehyde and a mono- or bi-nuclear aromatic hydrocarbon selected from the group consisting of toluene, naphthalene, xylene, alkylbenzene, polyalkyl benzene, alkyl naphthalene and polyalkyl naphthalene wherein the alkyl group is not highly branched and contains up to six carbon atoms in the presence of substantially anhydrous aluminium chloride.
Claim 11
Independent Claim
78 words
A method of producing an aromatic hydrocarbon-aldehyde condensation product consisting essentially of the step of reacting at a temperature of from 5° to 80° C. a mixture of iso-butyraldehyde and a mono- or bi-nuclear aromatic hydrocarbon selected from the group consisting of toluene, naphthalene, xylene, alkylbenzene, polyalkyl benzene, alkyl naphthalene and polyalkyl naphthalene wherein the alkyl group is not highly branched and contains up to six carbon atoms in the presence of substantially anhydrous aluminium chloride or bromide.
Claim 12
Independent Claim
78 words
A method of producing an aromatic hydrocarbon-aldehyde condensation product consisting essentially of the step of reacting at a temperature of from 5° to 80° C. a mixture of iso-butyraldehyde and a mono- or bi-nuclear aromatic hydrocarbon selected from the group consisting of toluene, naphthalene, xylene, alkylbenzene, polyalkyl benzene, alkyl naphthalene and polyalkyl naphthalene wherein the alkyl group is not highly branched and contains up to six carbon atoms in the presence of substantially anhydrous aluminium chloride or 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) | 1983-03-11 | 1983-09-10 | 1984-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-11 | 1987-09-10 | 1988-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-11 | 1991-09-10 | 1992-03-11 | $7700.00 | Window Closed / Lapsed |