| abstract |
PROBLEM TO BE SOLVED: To obtain 1,1,1,3-tetrachloropropane by reacting carbon tetrachloride produced by reaction of chlorine and methyl chloride and / or by reaction of methanol and hydrogen chloride with ethylene. A second step of obtaining 1,1,1,2,3-pentachloropropane by dehydrochlorination and chlorine addition of 1,1,1,3-tetrachloropropane obtained in the first step; In the process for producing 1,1,1,2,3-pentachloropropane comprising 1,1,1,1,2,3-pentachloropropane is obtained efficiently and stably. Since brominated impurities affect the reaction of the second step, the step of purifying carbon tetrachloride to reduce the total bromine amount to 30 ppmw or less before the first step, Before the step, at least one of the steps of setting the total bromine content in 1,1,1,3-tetrachloropropane to 30 ppmw or less is performed. [Selection figure] None |