Reactor for producing alkyl ketene dimer

The utility model relates to the technical field of chemical equipment, and discloses a reactor for producing alkyl ketene dimer, which comprises a kettle body and a cooling water pipe A, the cooling water pipe A is spirally fixed on the outer wall of the kettle body, a stirring part and a cooling part are arranged in the kettle body, the stirring part is used for stirring in the kettle body, the cooling part consists of a cooling water pipe B and an annular pipe, and the annular pipe is arranged in the kettle body. An air pipe is further fixed in the kettle body, one end of the air pipe penetrates through the top of the kettle body, and the other end of the air pipe is located at the bottom of the kettle body. The reaction kettle disclosed by the utility model has the beneficial effects that the cooling water pipe A cools the alkyl ketene dimer at the outermost layer in the kettle body, the alkyl ketene dimer at the middle layer is cooled by the cage-shaped cooling piece, and the heat of the alkyl ketene dim