| abstract |
The invention provides a method for continuously synthesizing vinylene carbonate or/and fluoroethylene carbonate in a microchannel, comprising the following steps: (1) in the presence of an organic amine initiator, ethylene carbonate and sulfonyl chloride are dissolved in a solvent After mixing, it is pumped into the first micro-reaction channel and reacts continuously to synthesize the chloroethylene carbonate crude product; Carry out dechlorination reaction in the channel, and in the process of dechlorination reaction, continuously cut into polymerization inhibitor and continue to react to synthesize vinylene carbonate; Or/and, (3) described chlorinated vinylene carbonate crude product and dechlorination After the catalyst and the fluorinating agent are mixed, the reaction is carried out in the third micro-reaction channel to continuously synthesize fluoroethylene carbonate. The present invention achieves VC yield >90% and FEC yield >95% under mild conditions; the present invention is green, economical, safe and efficient, significantly improves the atomic utilization rate of raw materials, and shortens the overall reaction period to within 1-2 hours. |