Using industrial-grade chloroethylene carbonate(CEC)as raw material,the saturation vapor pressure of CEC and HCl at different pressure and temperature are simulated and calculated by utilizing Aspen Plus software.Based on the simulation results,a falling film scraper evaporator is used as the main equipment for flash distillation purification of CEC to remove HC1,active chlorine,and other active impurities in CEC.The purification parameters are adjusted according to the experimental results,and the synthesis yield of vinylene carbonate is taken as the evaluation criteria for the purification effect.The optimal process conditions for the purification of CEC using the falling film scraper evaporator are determined as follows:a flash temperature of 70℃ and a pressure of 5 kPa.The purity of CEC is increased from 82％to 85.3％,and the synthesis yield of vinylene carbonate is increased from 65.2％to 75.5％.
chloroethylene carbonateAspen Plusfalling film scraper evaporatorpurificationvinylene carbonate
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