Abstract：Studies on catalytic pyrolysis of 1-chloro-1,1-difluoroethane (HCFC-142b) to vinylidene fluoride (VDF) by FeCl3/C, CuCl2/C and NiCl2/C were carried out under 400-630 ℃ and space time 32 s. The effects of temperature, carrier and catalyst on conversion of HCFC-142b, the content and selectivity of VDF were investigated. The results showed that FeCl3/C and CuCl2/C had good performance on reaction while NiCl2/C had little effect. The conversion of HCFC-142 and the content of VDF can be enhanced by 10%-20% and 3%-8% respectively, while the selectivity of VDF was reduced by 10% -14% when the reaction was catalyzed by FeCl3/C under 400-500 ℃. The conversion of HCFC-142 and the content of VDF can be enhanced above 50% when the reaction was catalyzed by CuCl2/C under 400-480 ℃. The selectivity has also been improved greatly. Carbenium ions mechanism was induced when FeCl3/C and CuCl2/C were used as catalysts.
Wang Gang,Zheng Haifeng,Yin Hong et al. Catalytic Effect of Active Carbon Supported Metal Chloride on the Pyrolysis 1-Chloro-1,1-Difluoroethane to Vinylidene Fluoride[J]. 化学反应工程与工艺, 2016, 32(1): 73-77.
