Patent ID: 8487146

Claim:
A process for the manufacture of 1,1,2,3-tetrachloropropene, the process comprising; (i) reacting carbon tetrachloride with ethylene in the presence of iron chlorides, iron metal, and a trialkylphosphate to produce a crude product containing 1,1,1,3-tetrachloropropane; (ii) distilling said crude product to produce an overhead stream and a bottom stream, the overhead stream comprising 1,1,1,3-tetrachloropropane and unreacted carbon tetrachloride and the bottom stream comprising 1,1,1,3-tetrachloropropane; (iii) reacting the overhead stream with chlorine in the presence of ferric chloride to produce crude 1,1,1,2,3-pentachloropropane; (iv) adding crude 1,1,1,2,3-pentachloropropane from step (iii) to a reaction zone, which is part of a reactive distillation process equipment comprising a reaction zone, a separation zone, and a condensing zone, and dehydrochlorinating the crude 1,1,1,2,3-pentachloropropane to form hydrogen chloride and 1,1,2,3-tetrachloropropene, and removing hydrogen chloride and 1,1,2,3-tetrachloropropene from the reaction zone during the course of the dehydrochlorination by distillation, and (v) collecting the 1,1,2,3-tetrachloropropene product.