Process for producing highly pure chlorinated alkane

A method of synthesizing 1,1,2,3-tetrachloropropene, comprising: obtaining a feedstock of a 1,1,1,2,3-pentachloropropane composition by feeding a chlorinated alkene into a reaction zone; contacting the chlorinated alkene with chlorine in said reaction zone to produce a reaction mixture containing the chlorinated alkane and the chlorinated alkenea; extracting a portion of the reaction mixture from the reaction zone, thereby providing an extracted reaction mixture, wherein the molar ratio of chlorinated alkane:chlorinated alkene in the extracted reaction mixture does not exceed 95:5, wherein the extracted reaction mixture comprises: the 1,1,1,2,3-pentachloropropane in amounts of at least 99.7%; oxygenated organic compounds in amounts of less than about 500 ppm; isomers of the C 3-6 chlorinated alkane in amounts less than about 500 ppm; non-isomeric alkane impurities in amounts of less than about 500 ppm; chlorinated alkenes in amounts of less than about 500 ppm; water in amounts of less than about 500 ppm; inorganic compounds of chlorine in amounts of less than about 100 ppm; brominated organic compounds in amounts of less than about 100 ppm; and iron in amounts of less than about 100 ppm; and contacting the 1,1,1,2,3-pentachloropropane composition with a metal catalyst in a dehydrochlorination zone in the liquid phase at a temperature of between about 60° C. to about 300° C.

A method of synthesizing 1,1,2,3-tetrachloropropene, comprising: obtaining a feedstock of a 1,1,1,2,3-pentachloropropane composition by feeding a chlorinated alkene into a reaction zone; contacting the chlorinated alkene with chlorine in said reaction zone to produce a reaction mixture containing the chlorinated alkane and the chlorinated alkenea; extracting a portion of the reaction mixture from the reaction zone, thereby providing an extracted reaction mixture, wherein the molar ratio of chlorinated alkane:chlorinated alkene in the extracted reaction mixture does not exceed 95:5, wherein the extracted reaction mixture comprises: the 1,1,1,2,3-pentachloropropane in amounts of at least 99.7%; oxygenated organic compounds in amounts of less than about 500 ppm; isomers of the C 3-6 chlorinated alkane in amounts less than about 500 ppm; non-isomeric alkane impurities in amounts of less than about 500 ppm; chlorinated alkenes in amounts of less than about 500 ppm; water in amounts of less than about 500 ppm; inorganic compounds of chlorine in amounts of less than about 100 ppm; brominated organic compounds in amounts of less than about 100 ppm; and iron in amounts of less than about 100 ppm; and contacting the 1,1,1,2,3-pentachloropropane composition with a metal catalyst in a dehydrochlorination zone in the gaseous phase at a temperature of between about 300° C. to about 500° C.