【文章內容簡介】 erican EastmanKodak pany built up the first set of the carbonylation synthesis of acetic anhydride production device. Celanese pany also has this technology. The production process is as follows: the first is the methanol and acetic 3 acid in sulfuric acid under the action of catalyst to generate methyl acetate, the reaction pressure is normal pressure, reaction temperature of 6585 C, the acetic acid conversion rate of about 100%. Then, methyl acetate and methanol and carbon monoxide in the methyl iodide and rhodium catalyst or nickel catalysts ( for rhodium catalyst catalytic activity of Ni catalyst is 10 times, so the industrial use of rhodium catalyst ) presence, for carbonylation reaction of acetic anhydride and acetic acid, cogeneration. The reaction pressure is about MPa, reaction temperature 180 degrees celsius. The acetic acid / acetic acid ratio can be adjusted according to the requirement. Reaction equation: CH3COOH+CH3OH CH3COOCH3+H2O。 CH3COOCH3+CO ( CH3CO ) 2O。 CH3OH+CO CH3COOH. Methyl acetate carbonylation with a short process, products of good quality, low consumption, less waste discharges etc., represents the advanced level of production technology of acetic anhydride. At present, the main foreign suppliers are used in the process of acetic anhydride. Liquid phase process than gas phase process maturity. British BP pany in Halcon and Monsanto synthesis of acetic anhydride carbonylation to acetic acid based on technology, the successful development of the carbonylation of methanol and acetic anhydride acetic acid process, and on 1987 implementation industrialization ( Figure 1 ( omitted) ). Gas phase carbonylation of Hoechst pany in 1986 developed, reaction temperature, 185216 C, by heterogeneous supported catalysts. The catalyst is a precious metals rhodium, iridium, palladium or rubidium contained in silica, three two aluminum oxide, magnesium oxide, two oxide carrier, which showed the highest activity of rhodium. Gas phase esterification reaction with liquid phase method are the same, and liquid phase carbonylation carbonylation are similar. The difference is: the liquid phase carbonylation of methyl acetate in liquid phase carbonylation reaction。 and the gas phase carbonylation reactions in the gas phase, gas phase process were removed from the reaction liquid catalyst recovery. Gas phase process can reduce the loss of rhodium, rhodium is fixed on the carrier without the accident was washed out in the solution. Gas phase process in terms of investment is better than that of liquid phase process, but the project cost is higher. In 2021, Dan group of Jiangsu, Chinese Academy of Sciences and Beijing University three homes, built up the first set of acetic anhydride carbonylation synthesis device, device dimensions is 20210 t / a acetic 4 anhydride . The device can also adjust the production of methyl acetate by Lanzhou Petrochemical Design Institute, engineering general contracting and design, production of acetic anhydride purity of the product reached more than %, more than % of methyl acetate. A ton of acetic anhydride consumption quota