IMPROVEMENTS IN OR RELATING TO A PROCESS FOR THE PRODUCTION OF AROMATIC CARBOXYLIC ACID

摘要

A process for the continuous production of an aromatic carboxylic acid by oxidising an alkyl aromatic compound in the liquid phase with an oxygen-containing gas in a reactor, in the presence of a metal compound and/or a bromine-containing compound, which comprises recirculating a part of the reaction gas delivered from the reactor and freed from the condensing components by returning it to the gas region in the reactor. This process produces aromatic carboxylic acids of high quality, while reducing or eliminating foaming occurring on the liquid surface in the reactor.