化學(xué)工程與工藝外文英文文獻(xiàn)翻譯醋酐生產(chǎn)工藝(完整版)
【正文】 . 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(chǎn)工藝 醋酐為無色易揮發(fā)，具有強(qiáng)烈刺激性氣味和腐蝕性液體。Acetic anhydride production process Acetic anhydride is a colorless volatile, with a strong irritating smell and corrosiveness liquid. Name of acetic anhydride, molecular formula C4H6O3, the flash point of DEG c.. Density of 0g / cm3. Melting point DEG c.. The boiling point of DEG c.. The refractive index nD . 20 degrees of viscosity of mPa? S. Spontaneous ignition temperature of DEG c.. Soluble in cold water, in water is deposed into acetic acid, ethyl acetate and ethanol production. Soluble in chloroform, ether and benzene. Toxic, eye and mucosa has a strong irritating, mass concentration of mg / m3 when the eye irritation。 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 pro
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