Catalytic hydrodechlorination of 1,3-dichloropropene

The hydrodechlorination reactions of 1,3-dichloropropene, a component of th e waste stream from epichlorohydrin manufacturing, were examined over a var iety of catalysts in a packed-bed microreactor. The reactor operated betwee n 7.5-9 Mpa and 325 degrees C and rates of hydrodechlorination were followe d for up to 14 h. Pt/gamma-Al2O3 and Ni/SiO2-Al2O3 catalysts were found to exhibit significant activity and no signs of deactivation over the course o f the experiments, while other catalysts such as NiMo/gamma-Al2O3 exhibited substantial deactivation. Activation energies for the disappearance of 1,3 -dichloropropene over the Pt/gamma-Al2O3 and Ni/SiO2-Al2O3 catalysts were f ound to be consistent with other dechlorination reactions, approximately 80 -120 kJ/mol (20-30 kcal/mol). (C) 1999 Elsevier Science Ltd. All rights res erved.