| 摘要 |
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 DEG 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. |
