Patent ID: 9624176
Date: 2017-04-18
CPC Classifications: C07D,Y02P

Claim:
1. A method for preparing caprolactam by using a microreactor under Lewis acid catalysis, comprising the following steps: (1) cyclohexanone oxime is dissolved in an organic solvent, an organic acid binding agent is added, and homogeneously mixed, to obtain a homogeneous solution; (2) a sulfonyl chlorides compound is dissolved in an organic solvent, and homogeneously mixed, to obtain a homogeneous solution; (3) a Lewis acid is dissolved in an organic solvent, and homogeneously mixed, to obtain a homogeneous solution; (4) the homogeneous solution obtained in step (1) and the homogeneous solution obtained in step (2) are concurrently and respectively pumped into a first microchannel reactor of a microreactor, and completely reacted, to obtain a cyclohexanone oxime sulphonates intermediate; (5) a mixed system obtained in step (4) and the homogeneous solution obtained in step (3) are concurrently and respectively pumped into a second microchannel reactor of the microreactor, and completely reacted, a outflow liquid is collected, to obtain the caprolactam.