Reduced-pressure reflux device of fine chemical reaction kettle

The utility model discloses a fine chemical engineering reaction kettle decompression reflux device, which belongs to the technical field of reaction kettles, and adopts the technical scheme that the fine chemical engineering reaction kettle decompression reflux device comprises a reaction kettle body, a buffer tank is arranged above the reaction kettle body, cooling liquid is contained in the buffer tank, the inner bottom end of the buffer tank is fixedly connected with a jacket, and the jacket is fixedly connected with the reaction kettle body. The upper end surface of the reaction kettle body is communicated with a condensation gas pipe, the other end of the condensation gas pipe penetrates through the top end of the buffer tank and is communicated with the upper end surface of the jacket, the lower end surface of the jacket is communicated with a liquid discharge pipe, and the other end of the liquid discharge pipe penetrates through the buffer tank and is communicated with the outer side wall of the cond