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六十年代以来,各国合成VC(氯乙烯)的路线基本上都已转入了以石油乙烯为原料的氧氯化法。目前就氧氯化法而言,被分为以下三种方法: 一步氧氯化法:乙烯与HCl或Cl_2,O_2直接一步合成VC。二步氧氯化法:包括氯化裂解一步反应与氧氯化反应。三步氧氯化法:包括直接氯化,氧氯化,裂解三个独立的反应。在外国,三步法的各步均已工业化,一步法于四十年代初即着手研究,但由于付产多氯化物过多,经济上不合理,故至今尚未工业化。二步法中除氧氯化法已工业化外,
Since the 1960s, the routes for synthesizing VC (vinyl chloride) in various countries have basically shifted to the oxychlorination process using petroleum ethylene as a raw material. The current method of oxychlorination, is divided into the following three methods: one step oxychlorination: ethylene and HCl or Cl_2, O_2 direct one-step synthesis of VC. Two-step oxychlorination: including chlorination one-step reaction and oxychlorination reaction. Three-step oxychlorination: including direct chlorination, oxychlorination, pyrolysis three independent reactions. In foreign countries, the steps of the three-step method have all been industrialized. The one-step method was started in the early 1940s. However, it has not yet been industrialized due to the excessive production of polychlorinated polyols, which is economically unjustifiable. Two-step dechlorination method has been industrialized,