abstract |
A process for the production of carboxylic acids by the hydrocarboxylation of olefinically unsaturated alkenes or esters using a rhodium catalyst, an iodide promoter, a solvent selected from the class consisting of methylene chloride, 1,2-dichloroethane, and C 6 to C 9 aromatic solvents, and an accelerator which is an acid having a pKa in the range of 4.2 to 5.2. |