US3855332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of polyarylenes
Assignee: Standard Oil Co
•
Filing: 1972-12-12
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Granted: 1974-12-17
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Expires: 1992-12-12
Abstract
Abstract Polyarylenes, polymers of aromatic hydrocarbons, are obtained by the coupling of aromatic hydrocarbons over a high surface area active carbon.
Inventors
- 👤 C Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:38
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
58 words
A PROCESS FOR THE PREPARATION OF BRANCHED POLYARYLENES WHICH COMPRISES TREATING AN AROMATIC HYDROCARBON, A PARTIALLY HYDROGENATED AROMATIC HYDROCARBON, OR A MIXTURE OF AN AROMATIC HYDROCARBON AND A PARTIALLY HYDROGENATED AROMATIC HYDROCARBON WITH AN ACTIVE CARBON WHOSE SURFACE AREA IS AT LEAST ABOUT 1500 M2/G IN THE PRESENCE OF HYDROGEN AND AT A TEMPERATURE OF AT LEAST 800*F.
Claim 2
Dependent Claim
58 words
A PROCESS FOR THE PREPARATION OF BRANCHED POLYARYLENES WHICH COMPRISES TREATING AN AROMATIC HYDROCARBON, A PARTIALLY HYDROGENATED AROMATIC HYDROCARBON, OR A MIXTURE OF AN AROMATIC HYDROCARBON AND A PARTIALLY HYDROGENATED AROMATIC HYDROCARBON WITH AN ACTIVE CARBON WHOSE SURFACE AREA IS AT LEAST ABOUT 1500 M2/G IN THE PRESENCE OF HYDROGEN AND AT A TEMPERATURE OF AT LEAST 800*F.
Claim 3
Dependent Claim
23 words
The process of claim 1 wherein the temperature is between 800*F and 1300*F and the pressure is between 600 psig and 2000 psig.
Claim 4
Dependent Claim
20 words
The process of claim 2 wherein the surface area of the active carbon is between 2000 m2/g and 3500 m2/g.
Claim 5
Dependent Claim
24 words
The process of claim 2 wherein the active carbon catalyst is loaded with from about 10% to about 15% by weight of base material.
Claim 6
Dependent Claim
21 words
The process of claim 4 wherein the base material is selected from the group consisting of KOH, NaOH, Ca(OH)2, and Mg(OH)2.
Claim 7
Dependent Claim
40 words
The process of claim 1 wherein the partially hydrogenated aromatic hydrocarbon is a member of the group consisting of a partially hydrogenated benzene, a partially hydrogenated biphenyl, a partially hydrogenated toluene, a partially hydrogenated naphthalene, and alkylated hydrocarbon derivatives thereof.
Claim 8
Dependent Claim
23 words
The process of claim 1 wherein the aromatic hydrocarbon is selected from the group consisting of benzene, biphenyl, toluene, xylene, ethylbenzene, and naphthalene.
Claim 9
Dependent Claim
11 words
The process of claim 1 wherein the aromatic hydrocarbon is biphenyl.
Claim 10
Dependent Claim
20 words
The process of claim 1 wherein the aromatic hydrocarbon is biphenyl and the partially hydrogenated aromatic hydrocarbon is phenyl cyclohexane.
Claim 11
Dependent Claim
22 words
The process of claim 1 wherein the partially hydrogenated aromatic hydrocarbon is from 2 to 5% of the total weight of reactants.
Claim 12
Dependent Claim
22 words
The process of claim 1 wherein the partial hydrogen pressure under reaction conditions is at least 30% of the total reaction pressure.
Claim 13
Dependent Claim
21 words
The process of claim 1 wherein the active carbon catalyst is from 1 to 4% of the weight of the reactants.
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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |