In the reaction tank into 240kg dichloromethane, 17kg (105.4mol) benzocaine, 20kg triethylamine, and then 42kg vinyl chloride (131.7mol) diluted with the appropriate amount of dichloromethane, at -3 ~ 5 slowly added to the above reaction tank, plus the end of the reaction at 30-35 for 2 hours, distillation under reduced pressure to the tank precipitated a large number of solids, add 60kg 95% ethanol, stirring, cooling precipitation crystals, centrifugation, washing, drying, that is, 48.9kg of finished product vinyl ester yield 83.0%, purity 99.0%. 60kg of 95% ethanol, stirring, cooling precipitation, centrifugation, washing, drying, that is, 48.9kg of finished products of Viamine ester, yield 83.0%, purity 99.0%.
