A method for recovering much of the carbon and chlorine value in the heavy ends and other undesired by-products formed during the production of a C
3
or higher polychlorinated alkane through the reaction of carbon tetrachloride with an olefine or chlorinated olefine, the improvement comprising the step of first separating the heavy ends and any other higher or lower boiling chlorohydrocarbon impurities from most of the desired product, and subjecting the separated heavy ends and impurities therewith to a high temperature exhaustive chlorination to produce carbon tetrachloride, tetrachloroethene, and minor amounts of hexachlorobutadiene and hexachlorobenzene by-products.
一种用于回收在生产C3或更高级多
氯代烷时形成的重质端部和其他不需要的副产品中的大部分碳和
氯价值的方法,通过将
四氯化碳与烯烃或
氯化烯烃反应,改进包括首先将重质端部和任何其他高沸点或低沸点的
氯化碳氢化合物杂质从大部分所需产品中分离出来,然后将分离出的重质端部和杂质置于高温下进行彻底
氯化,以产生
四氯化碳、
四氯乙烯和少量的六氯
丁二烯和
六氯苯副产物。