Method for synthesizing N-alkyl-4-nitrophthalimide through multistage series-parallel gas-liquid microreactors

The invention discloses a method for synthesizing N-alkyl-4-nitrophthalimide through a multistage series-parallel gas-liquid microreactor, and belongs to the technical field of organic synthesis processes. According to the method, N-alkyl phthalimide is taken as a raw material, nitrogen pentoxide is taken as a nitrating agent, and low-temperature nitration is carried out in a multi-stage series-parallel gas-liquid microreactor to continuously synthesize N-alkyl-4-nitrophthalimide series products. The device is formed by combining a Venturi gas-liquid reactor and a series-parallel micro-channel reactor system with a special microstructure, and the reaction temperature is accurately controlled to prevent temperature runaway by utilizing the efficient gas-liquid absorption efficiency of the Venturi reactor and the excellent mass transfer and heat transfer efficiency of the micro-channel reactor; the absorption and mass transfer rate among the materials is effectively enhanced, the process conditions are mild, th