| abstract |
(57) [Summary] (Problem corrected) [PROBLEMS] To reduce the impurity content in the obtained reaction product solution and simultaneously reduce the hydrogen iodide content and the water content without particularly reducing the carbonylation reaction efficiency. Provide a way to reduce. SOLUTION: The method for producing an organic carboxylic acid includes a carbonylation reaction step in which a carbonylation reaction raw material is subjected to a carbonylation reaction with carbon monoxide in the presence of a carbonylation reaction catalyst, an alkyl iodide and water in a reaction solvent. (I) using a rhodium catalyst immobilized on a nitrogen-containing insoluble resin carrier as the carbonylation reaction catalyst; (ii) the amount of water present in the reaction system is 0.5 to 10% by weight in the reaction mixture; (Iii) the hydrogen partial pressure in the reaction system is 0.1 to 5 kg / cm 2, the carbon monoxide partial pressure is 7 to 30 kg / cm 2 , and the reaction temperature is 140 to 250 ° C. A method for producing an organic carboxylic acid. |