| abstract |
(57) [Summary] [Structure] Using a rhodium complex as a catalyst and methyl iodide as a co-catalyst, a method for producing acetic acid by continuously reacting methanol and / or methyl acetate aqueous solution with carbon monoxide is obtained. Unsaturated compound concentration in crude acetic acid is 5p The method for producing acetic acid is characterized in that it is adjusted to pm or less, and the obtained crude acetic acid is treated with ozone to produce high-quality acetic acid having a low content of reducing substances. [Effect] Acetic acid of sufficiently high quality, that is, excellent in permanganate time, can be obtained by an economical and efficient method. |