Process for producing trimellitic acid

Details Process for producing trimellitic acid Process for producing trimellitic acid

1982-06-14

1983-08-09

Siegel, Alan

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

C07C 5116

Patent

active

043980406

ABSTRACT:
Trimellitic acid is produced in higher yield by liquid phase air oxidation of pseudocumene in acetic acid as a solvent in the presence of cobalt, manganese, and bromine as a catalyst, where the oxidation is carried out at two stages comprising a first stage of reaction at a temperature of 110.degree. to 170.degree. C. and a second stage of reaction at a temperature of 180.degree. to 240.degree. C. while maintaining a reaction pressure under a condition of the following formula throughout the reaction:

REFERENCES:
patent: 3683016 (1972-08-01), Darin et al.
patent: 3920735 (1975-11-01), Wampfler et al.

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