Patent ID: 7432390
Filing Date: 2008-10-07
Classification: C07C

Abstract:
1. A method of producing a carboxylic acid or carboxylic acid ester, which comprises a step of producing a crude reaction product containing the carboxylic acid or carboxylic acid ester by a reaction of an olefin, carbon monoxide, and water or an alcohol in the presence of HF catalyst, and a step of heat-treating at least a part of the crude reaction product, at a temperature of 150 to 200° C. for 1 to 5 hours, in the presence of a solid acid as an acid catalyst, that acts as a catalyst in decomposition of organic fluorine compounds, and an acid adsorbent, wherein an amount of the solid acid used is from 0.005 to 0.1 part by weight per one part by weight of the carboxylic acid or carboxylic acid ester, and the amount of the acid adsorbent used is from 0.001 to 0.005 part by weight per one part by weight of the carboxylic acid or carboxylic acid ester, and the product obtained by the heat-treating is subjected to distillation.