CARBONYLATION PROCESS

摘要

A carbonylation process for making acetic acid using a metallic co-catalyst composition comprising a rhodium stabilizer and rate promoter at molar ratios of metal/rhodium of about 0 5 to 40. The process includes reacting methanol with a carbon monoxide in th presence of a rhodium based catalytic metale complex together with about 1 to 20 weight percent methyl iodide, in the presence of less than 8% water and 05 to about 30 weight percent methyl acetate. The crude acetic acid is flashed and further purified This process is stable with an STY greater than 10 mol/L/hr