| abstract |
(57) [Summary] [Objective] Novel high purity acetic acid and / or high purity acetic anhydride with reduced organic iodide and carbonyl impurities in acetic acid and / or acetic anhydride formed by rhodium catalyzed carbonylation method Of various manufacturing methods. A method for producing acetic acid and / or acetic anhydride by continuously reacting carbon monoxide with at least one component of methanol, methyl acetate and dimethyl ether in the presence of a rhodium catalyst, an iodide salt and methyl iodide. , A strong acidic cation in which at least 1% of the active site is exchanged for silver and / or mercury form in the liquid acetic acid and / or liquid acetic anhydride obtained by carrying out the reaction while keeping the acetaldehyde concentration in the reaction liquid at 400 ppm or less. Contact with exchange resin. |