Process for producing carboxylic acids

摘要

Carboxylic acids are produced in the liquid phase carbonylation reaction from an alcohol or its derivative and carbon monoxide in the presence of a catalyst system containing a rhodium component and an alkyl halide and water, adding an iodide salt to the rhodium/alkyl halide catalyst system so as to maintain the iodine ion concentration in the carbonylation reaction solution at 0.3 mol/ lambda or higher.