申请人:KUREHA CHEMICAL INDUSTRY CO., LTD.
公开号:EP0573920A2
公开(公告)日:1993-12-15
A process for the manufacture of tetrachloroethylene comprising steps of producing tetrachloroethylene by the reaction of a hydrocarbon having 3 or less carbon atoms, a partially chlorinated hydrocarbon having 3 or less carbon atoms, or a mixture of these, with carbon tetrachloride and chlorine gas in a reaction vessel at 500-700°C, obtaining the gas formed in the reaction at a state wherein the amount of carbon tetrachloride therein is equivalent to or smaller than the amount of the carbon tetrachloride supplied and the chlorine concentration therein is 7-15 mol%, separating and collecting tetrachloroethylene from said gas formed in the reaction by distillation, and recycling all amount of carbon tetrachloride in the gas formed in the reaction and chlorine gas to the reaction vessel for reuse. Recycling of carbon tetrachloride and chlorine gas ensures the conversion of the carbon tetrachloride into tetrachloroethylene in a closed system, prevents production of carbontetra chloride in the manufacturing of tetrachloroethylene, and makes it possible even to convert carbon tetrachloride by-produced in other processes into tetrachloroethylene.
一种制造四氯乙烯的工艺,包括以下步骤:在 500-700°C 的反应容器中,使具有 3 个或更少碳原子的碳氢化合物、具有 3 个或更少碳原子的部分氯化碳氢化合物或这些碳氢化合物的混合物与四氯化碳和氯气反应,生成四氯乙烯、在反应中形成的气体中,四氯化碳的含量等于或小于所提供的四氯化碳的含量,且其中氯的浓度为 7-15 摩尔%,通过蒸馏从反应中形成的气体中分离和收集四氯乙烯,并将反应中形成的气体中的所有四氯化碳和氯气回收到反应容器中再利用。四氯化碳和氯气的回收利用可确保在封闭系统中将四氯化碳转化为四氯乙烯,防止在生产四氯乙烯的过程中产生四氯化碳,甚至可以将其他工艺中产生的四氯化碳转化为四氯乙烯。