Process for the production of trimellitic acid

Details Process for the production of trimellitic acid Process for the production of trimellitic acid

1989-12-18

1991-02-12

Lone, Werren B.

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

Organic compounds

Carboxylic acids and salts thereof

562414, 562416, 562417, 562480, 502304, C07C 51215

Patent

active

049925792

ABSTRACT:
A process for the manufacture of trimelitic acid from pseudocumene is disclosed. The pseudocumene is oxidized in the presence of a cerium, cobalt, manganese, and optionally zirconium, bromine catalyst wherein all of the cerium is added in the second stage of the oxidation, and wherein most of the bromine is also added during the second oxidation stage. Trimellitic acid is useful in the manufacture of polyester and polyamide-imides.

REFERENCES:
patent: 3491144 (1970-01-01), Ember et al.
patent: 4719311 (1988-01-01), Partenheimer
patent: 4835308 (1989-05-01), Sakakibara et al.

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