【正文】 te, methyl acetate in carbonylation reactor and CO synthesis of acetic anhydride. Because the process of catalyst in water, generation acetic anhydride at the same time, also generates a part of acetic acid. The processes for the production of acetic anhydride mainly, main raw material for CO and methanol, acetic acid. In addition, the process also can directly use the raw materials of methanol and CO in the carbonylation reactor in response to acetic acid, without esterification device. Therefore, the process can be based on market demand for acetic acid, methyl acetate and acetic anhydride products switch. by carbonylation catalyst technology is the most important, Institute of Chemistry Chinese Academy of Sciences after years of research and development and development of the domestic catalyst multidentate Ji Ji heterozygous rhodium plexes catalyst. And the United States Monsanto developed catalyst, the catalyst has a water content of less. From Jiangsu, the Dan group use, reaction conditions and catalyst abroad basically the same ( reaction pressure 36MPa, temperature 160200 C ), an ideal application. In addition to using rhodium catalyst, the carbonylation synthesis of acetic anhydride process can also be used for other metal catalysts. Although the rhodium catalyst catalytic activity and selectivity for the best, but there are expensive, shortage of resources, recycling costs higher shorting. Therefore, many panies have shifted their attention to non noble metal catalysts, which are mainly I A III A B or B, VI, VIII nonnoble metals. Among them, nickel catalyst in the reaction conditions such as mild and catalytic properties are obviously superior to other nonnoble metal, is a kind of the most development prospect of non noble metal catalysts. Vinyl ketone and carbonyl synthesis process is the production of acetic anhydride used method. From the contrast can be seen in Table 1, ketene process is relatively plex, the product quality is low, the energy consumption is relatively high, high cost, pollution, heavy, small scale. 5 醋酐生產工藝 醋酐為無色易揮發(fā)，具有強烈刺激性氣味和腐蝕性液體。 CH3COOCH3+CO ( CH3CO ) 2O。 CH3COOOCH ( OH ) CH3 ( CH3CO ) 2O+H2O。s brain electrical image, can cause tissue protein modification. The steam stimulation is stronger, extremely easy to burn the skin and eyes, such as frequent exposure can cause dermatitis and chronic conjunctivitis. On rat oral LD50 was 1780 mg / kg. When spilled and or adhesion to the skin, to immediately with water or 2% washing soda, systemic poisoning should be timely medical treatment. Air max allowable volume fraction 5 u L / L. Acetic anhydride is the country to encourage the development of basic anic chemical raw materials, mainly used for the production of cellulose acetate, of which two cellulose acetate is used in the manufacture of cigarette filter tip and plastic, three cellulose acetate is the manufacturing of advanced film material, is widely used in medicine, pesticides, dyes, military, spices, metal finishing anhydride is precursor products, acetic anhydride production, management must be in the public security an