Process for producing pyromellitic acid

Details Process for producing pyromellitic acid Process for producing pyromellitic acid

1987-10-06

1989-04-25

Shippen, Michael L.

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

Organic compounds

Carboxylic acids and salts thereof

C07C 51265

Patent

active

048249920

ABSTRACT:
A process for producing pyromellitic acid which comprises oxidizing 2,4,5-trimethylbenzaldehyde with a gas containing molecular oxygen in the presence of a water solvent containing 0.5 to 12% by weight of bromine ion, 0.01 to 2.0% by weight of manganese ion and 0.1 to 10,000 ppm by weight of iron ion.
According to the present invention, pyromellitic acid can be obtained in a high yield and, at the same time, the amount of remaining intermediate compounds such as methyltrimellitic acid and the like can be made few, so that pyromellitic acid can be purified easily.

REFERENCES:
patent: 4719311 (1988-01-01), Partenheimer
Chemical Abstracts, vol. 106, Feb. 9, 1987, No. 6.

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