| abstract |
The method for producing acetic acid according to the present invention is to continuously react acetic acid with methanol and carbon monoxide in the presence of a rhodium catalyst, an iodide salt, methyl iodide, methyl acetate and water, and maintain acetaldehyde concentration in the reaction solution at 500 ppm or less. It is a method of producing at a production rate of 11 mol / L ยท hr or more,n n n The reaction is performed under conditions where the carbon monoxide partial pressure in the gas phase of the reactor is 1.05 MPa or more, or when the concentration of methyl acetate in the reaction solution is 2% by weight or more, and the production rate of acetaldehyde is maintained at 1/1500 or less of the production rate of acetic acid. do. |