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    • 4. 发明授权
    • Method for the preparation of 1,2-dichloroethane
    • 1,2-二氯乙烷的制备方法
    • US4783564A
    • 1988-11-08
    • US102291
    • 1987-09-25
    • Bernhard PiotrowskiRoland SchildhauerKurt DeselaersWolfgang Merkel
    • Bernhard PiotrowskiRoland SchildhauerKurt DeselaersWolfgang Merkel
    • B01J23/00C07B61/00C07C17/00C07C17/02C07C19/045C07C67/00
    • C07C17/02
    • A method is disclosed for the preparation of 1,2-dichloroethane in a reactor by the reaction of gaseous ethylene with chlorine dissolved in a hot, catalyst-containing, liquid circulating stream that is under elevated pressure and consists of chlorinated hydrocarbons. All of the chlorine is absorbed outside of the reactor, at a temperature above 90.degree. C., a pressure of more than 4 bar, and an average residence time of less than 120 seconds. The reaction takes place at the phase boundary surface of a dispersion produced from gaseous ethylene and the chlorine-containing, liquid, circulating stream, at an energy dissipation density of 0.05 to 1000 kilowatts per cubic meter, a temperature of 90.degree. to 200.degree. C., and a pressure of 7 to 20 bar. Iron(III) chloride is used preferably as catalyst. Oxygen is used preferably as inhibitor for preventing the formation of byproducts. The separation of the unreacted amounts of ethylene and chlorine as well as other gaseous components from the product-containing circulating stream is performed preferably in an expansion tank.
    • 公开了一种在反应器中通过气态乙烯与氯溶解在热的含催化剂的液体循环流中的氯气的反应来制备1,2-二氯乙烷的方法,所述热的含催化剂的液体循环流在升高的压力下由氯代烃组成。 所有氯在反应器外部被吸收,温度高于90℃,压力大于4巴,平均停留时间小于120秒。 反应发生在由气态乙烯和含氯液体循环流产生的分散体的相界面处,能量耗散密度为0.05〜1000千瓦/立方米,温度为90〜200℃ 压力为7至20巴。 优选使用氯化铁(III)作为催化剂。 氧优选用作防止副产物形成的抑制剂。 优选在膨胀罐中进行未反应量的乙烯和氯以及其它气态成分从含产物循环流中的分离。