Process for preparing 2,5-dichloro-3-nitrobenzoic acid from 2,5- dichloro- 3-nitro-p-xylene

摘要

A process for the production of 2,5-dichloro-3-nitrobenzoic acid which comprises reacting 2,5-dichloro-3-nitro-p-xylene in a saturated aliphatic carboxylic acid solvent with oxygen at elevated temperature and pressure in the presence of a catalyst system which comprises a transition metal oxidation catalyst and a bromine promoter.