Process for the production of trimellitic acid and process for t

Details Process for the production of trimellitic acid and process for t Process for the production of trimellitic acid and process for t

1998-07-15

1999-04-20

Barts, Samuel

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

562414, 562416, 562487, C07C 51265

Patent

active

058958207

ABSTRACT:
A process for the production of a trimellitic acid by oxidizing dialkyl aromatic aldehyde and/or its oxide derivative in a liquid phase, the oxidation being carried out in a lower aliphatic carboxylic acid solvent having a water content of 5 to 70% by weight in the presence of a catalyst containing a heavy metal and bromine or being carried out in a solvent containing a lower aliphatic carboxylic acid in the presence of a bromine-manganese catalyst system containing zirconium and/or cerium, and a process for the production of high-quality trimellitic acid anhydride from the trimellitic acid.

REFERENCES:
patent: 5124461 (1992-06-01), Park
patent: 5250724 (1993-10-01), Fumagalli et al.

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