US4093647A
Expired / Lapsed
US
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Process for oxycarbonylation of aromatic hydrocarbons
Assignee: Sunoco Inc R&M
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Filing: 1977-08-22
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Granted: 1978-06-06
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Expires: 1997-08-22
Abstract
Abstract A process for making aromatic carboxylic acids by reacting carbon monoxide with an aromatic compound in the presence of a mixture of a thallium salt and a palladium salt whereby highly efficient use of the available oxidant is achieved.
Inventors
- 👤 John J. van Venrooy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:31
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/10; C07C51/145
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
102 words
A process for making aromatic carboxylic acids which comprises reacting at a temperature of from about 0° to about 100° C, an aromatic hydrocarbon of the benzene series having at least one ring carbon atom attached to a hydrogen atom with carbon monoxide at a pressure of from about 10 to about 500 psi in a solvent selected from the group consisting of lower aliphatic carboxylic acids, their anhydrides and mixtures thereof and in the presence of a mixture comprising thallium trifluoroacetate and a divalent palladium salt in a mole ratio of thallium to palladium of from about 10:1 to about 1000:1.
Claim 2
Dependent Claim
102 words
A process for making aromatic carboxylic acids which comprises reacting at a temperature of from about 0° to about 100° C, an aromatic hydrocarbon of the benzene series having at least one ring carbon atom attached to a hydrogen atom with carbon monoxide at a pressure of from about 10 to about 500 psi in a solvent selected from the group consisting of lower aliphatic carboxylic acids, their anhydrides and mixtures thereof and in the presence of a mixture comprising thallium trifluoroacetate and a divalent palladium salt in a mole ratio of thallium to palladium of from about 10:1 to about 1000:1.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein the aromatic compound is toluene.
Claim 4
Dependent Claim
11 words
The process of claim 1 wherein the aromatic compound is benzene.
Claim 5
Dependent Claim
13 words
The process of claim 1 wherein the aliphatic acid solvent is trifluoroacetic acid.
Claim 6
Dependent Claim
13 words
The process of claim 1 wherein the aliphatic acid anhydride is trifluoroacetic anhydride.
Claim 7
Dependent Claim
19 words
The process of claim 1 wherein the solvent system comprises a mixture of trifluoroacetic acid and trifluoroacetic acid anhydride.
Claim 8
Dependent Claim
11 words
The process of claim 6 wherein the aromatic compound is benzene.
Claim 9
Dependent Claim
11 words
The process of claim 6 wherein the aromatic compound is toluene.
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) | 1981-06-05 | 1981-12-05 | 1982-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-05 | 1985-12-05 | 1986-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-05 | 1989-12-05 | 1990-06-06 | $7700.00 | Window Closed / Lapsed |