Process for the preparation of carboxylic acids or corresponding esters in presence of a catalyst based on iridium

摘要

The present invention relates to the preparation of carboxylic acids or of the corresponding esters by reaction of an alcohol with carbon monoxide in the presence of a catalyst containing iridium and of a halogenated promoter. The reaction is carried out with a reaction mixture whose composition is maintained throughout the operation. The said mixture comprises between 0 exclusive and 10% of water, between 0 exclusive and 10% of halogenated promoter, and between 2 and 40% of ester corresponding to the reaction of the abovementioned carboxylic acid and alcohol, the said carboxylic acid constituting the solvent of the reaction.