US4464303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of higher aryl esters cross-reference to related applications
Assignee: Ashland LLC
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Filing: 1982-09-13
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Granted: 1984-08-07
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Expires: 2002-09-13
Abstract
Abstract An improved process for the manufacture of higher aromatic hydrocarbon esters, such as naphthyl esters, by liquid phase reaction of the higher aromatic hydrocarbon compound with molecular oxygen in the presence of a higher carboxylic acid over a catalyst composed essentially of a compound of palladium and an antimony compound wherein the aromatic compound is dissolved in an inert solvent and is added continuously to the reaction zone and water formed in the reaction is rapidly and continuously removed from the reaction zone.
Inventors
- 👤 Anil B. Goel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:54
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/04; C07C67/05; C07C67/055
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
86 words
An oxidation process for the manufacture of higher aryl esters comprising contacting the reaction mixture of a higher aromatic hydrocarbon selected from the group consisting of naphthalene, anthracene, biphenyl, phenanthrene, and terphenyls, an organic solvent, a carboxylic acid and molecular oxygen in the liquid phase at a temperature in the range of from 100° to 300° C., with a catalyst composed of a palladium carboxylate, an antimony carboxylate and optionally a carboxylate of at least one metal selected from the group consisting of chromium and manganese.
Claim 2
Dependent Claim
86 words
An oxidation process for the manufacture of higher aryl esters comprising contacting the reaction mixture of a higher aromatic hydrocarbon selected from the group consisting of naphthalene, anthracene, biphenyl, phenanthrene, and terphenyls, an organic solvent, a carboxylic acid and molecular oxygen in the liquid phase at a temperature in the range of from 100° to 300° C., with a catalyst composed of a palladium carboxylate, an antimony carboxylate and optionally a carboxylate of at least one metal selected from the group consisting of chromium and manganese.
Claim 3
Dependent Claim
73 words
The process of claim 1 wherein the carboxylic acid has the formula R(COOH) n wherein n is an integer of 1 or more and R is a hydrocarbon group having at least 5-n carbon atoms, wherein the higher aromatic hydrocarbon is added continuously to the reaction mixture, and the water formed in the process is entrained with the organic water-immiscible solvent and removed continuously from the reaction mixture as the ester is formed.
Claim 4
Dependent Claim
12 words
The process of claim 2 wherein the higher aromatic hydrocarbon is naphthalene.
Claim 5
Dependent Claim
15 words
The process of claim 3 wherein the catalyst is composed of palladium and antimony carboxylates.
Claim 6
Dependent Claim
29 words
The process of claim 1 wherein the organic solvent is a linear hydrocarbon having the formula C n H 2n+2 wherein n is a number from 4 to 14.
Claim 7
Dependent Claim
16 words
The process of claim 1 wherein the organic solvent is a linear or cyclic aliphatic ether.
Claim 8
Dependent Claim
12 words
The process of claim 2 wherein the higher aromatic compound is biphenyl.
Claim 9
Dependent Claim
16 words
The process of claim 2 wherein the catalyst is composed of palladium, antimony and chromium acetates.
Claim 10
Dependent Claim
16 words
The process of claim 2 wherein the catalyst is composed of palladium, antimony and manganese acetates.
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) | 1987-08-07 | 1988-02-06 | 1988-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-07 | 1992-02-06 | 1992-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-07 | 1996-02-06 | 1996-08-07 | $7700.00 | Window Closed / Lapsed |