Process for making aromatic polycarboxylic acids and oxidation c

Details Process for making aromatic polycarboxylic acids and oxidation c Process for making aromatic polycarboxylic acids and oxidation c

1990-06-21

1992-01-14

Dees, Jose G.

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

Organic compounds

Carboxylic acids and salts thereof

502169, 502170, 502171, 502227, 502228, 502229, 562417, 562480, 562488, C07C 51265, B01J 3100

Patent

active

050812904

ABSTRACT:
There is provided a process for the partial oxidation of a polymethylbenzene to the corresponding aromatic polycarboxylic acid, which process comprises contacting in a reaction zone said polymethylbenzene with molecular oxygen in the presence of an oxidation catalyst comprising at least one heavy-metal compound, said heavy-metal compound being acetate free, a source of bromine, and a non-metal acetate compound, the concentration of acetate in the reaction zone being employed to control the rate of oxidation and the selectivity of oxidation.
There is also provided the catalyst that is employed in the process.

REFERENCES:
patent: 4716245 (1987-12-01), Hirose
patent: 4876386 (1989-10-01), Holzhauer et al.
patent: 4950786 (1990-08-01), Sanchez et al.

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