Method for making 1,1,3,3-tetrachloropropene
A process for the manufacture of 1,1,3,3-tetrachloropropene, the process comprising dehydrochlorinating 1,1,1,3,3-pentachloropropane.
1. A process for the manufacture of 1,1,3,3-tetrachloropropene, the process comprising:
dehydrochlorinating 1,1,1,3,3-pentachloropropane, where said step of dehydrochlorinating 1,1,1,3,3-pentachloropropane takes place in the presence of an oxidizing agent and at a temperature of from about 60° C. to about 160° C.
2. The process of claim 1 , wherein said step of dehydrochlorinating 1,1,1,3,3-pentachloropropane takes place in the presence of a Lewis acid.
3. The process of claim 2 , wherein the Lewis acid is ferric chloride.
4. The process of claim 1 , wherein the oxidizing agent is chlorine.
5. The process of claim 3 , wherein said step of dehydrochlorinating takes place in the presence of from about 30 to about 10,000 ppm ferric chloride.
6. The process of claim 4 , wherein said step of dehydrochlorinating takes place in the presence of from about 100 ppm to about 3 wt % chlorine.
7. The process of claim 1 , wherein said step of dehydrochlorinating includes reactive distillation.
8. The process of claim 1 , wherein said step of dehydrochlorinating takes place at a pressure of from about 0.05 atmospheres to about 0.5 atmospheres.
9. The process of claim 1 , wherein said step of dehydrochlorinating includes reactively distilling a crude 1,1,1,3,3-pentachloropropane stream.
10. The process of claim 9 , wherein the crude 1,1,1,3,3-pentachloropropane stream includes 1,1,1,3,3-pentachloropropane, carbon tetrachloride, vinyl chloride, iron, and at least one of amines, nitriles, amides, and phosphates.
11. The process of claim 1 , wherein said step of dehydrochlorinating includes reactively distilling a partially purified 1,1,1,3,3-pentachloropropane stream.
12. The process of claim 11 , wherein said partially purified 1,1,1,3,3-pentachloropropane stream includes 1,1,1,3,3-pentachloropropane, carbon tetrachloride, and vinyl chloride.