醋酸乙烯相关材料123123（Vinyl acetate related material 123123）.doc

醋酸乙烯相关材料123123（Vinyl acetate related material 123123） This article is contributed by weihuahanjz vinyl acetate Vinyl acetate (VAc) is one of the 50 most important chemical products in the world. It is an important organic chemical raw material. Easy polymerization, polymerization by itself or with other monomers, mainly used in the production of polyvinyl acetate (PVAc), polyvinyl alcohol (PVA), ethylene vinyl acetate copolymer emulsion (VAE) or (EVA) copolymer resin, vinyl acetate and vinyl chloride copolymer (EVC), acetal resin derivatives. The use of these derivatives is very wide, can be used for fiber, adhesives, coatings, emulsifier, textile sizing and finishing agent, film, safety glass, water soluble film, soil improvement agent and so on, widely used in construction, machinery, automobile, textile, papermaking, packaging, printing and dyeing, printing, furniture, cigarette and other departments. With the progress of science and technology, new application fields are still expanding. First, the production process of vinyl acetate, vinyl acetate production process, production of vinyl acetate, there are usually two routes of raw materials, ethylene and acetylene. Ethylene gas phase ethylene gas phase method is currently adopted abroad many methods, the process of ethylene, oxygen and acetic acid vapor in the noble metal Pd-Au (or Pt) catalyst catalyst and potassium acetate, at 100 to 200 DEG C, 0.6 ~ 0.8MPa under the condition of reaction in fixed bed reactor. The reaction products obtained by separation, distillation of vinyl acetate. The key difference between the two processes, that is, Bayer gas phase method and USI gas phase method, is that the catalyst is the catalyst. Bayer method has high catalytic activity and the yield of space time is about two times of USI. The operation conditions are severe, and the catalyst life is not longer than that of USI method, but generally more than 1 years. The catalyst activity of USI method is high without Bayer and