Methods of making chlorinated hydrocarbons

摘要

Methods for the manufacture of 1,1,1,2,3-pentachloropropane from 1,1,1,3-tetrachloropropane and chlorine are disclosed. Improved methods are provided for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,2,3-pentachloropropane. Methods are also disclosed for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,3-tetrachloropropane and chlorine and for the manufacture of 1,1,2,3-tetrachloropropene from carbon tetrachloride, ethylene, and chlorine.

主权项

1. A process for producing 1,1,1,2,3-pentachloropropane, the process comprising:
i. charging 1,1,1,3-tetrachloropropane to a reaction vessel, where said step of charging 1,1,1,3-tetrachloropropane may include simultaneously charging carbon tetrachloride to the reaction vessel; ii. charging chlorine to the reaction vessel; and iii. catalyzing within the reaction vessel at least two reactions, where a first reaction includes the dehydrochlorination of 1,1,1,3-tetrachloropropane to an intermediate trichloropropene, and where a second reaction includes an addition reaction between the intermediate trichloropropene and chlorine to produce the 1,1,1,2,3-pentachloropropane, where said process is devoid of any intermediate isolation or purification of the intermediate trichloropropene within the reaction vessel, and where said step of catalyzing dehydrochlorinates the 1,1,1,3-tetrachloropropane to intermediate trichloropropene and adds chlorine to the intermediate trichloropropene at a rate sufficient to provide a weight ratio of 1,1,1,2,3-pentachloropropane to intermediate trichloropropene of at least 1.5:1.