The working principle of the reactor is: the reaction solvent can be put into the inner layer for stirring reaction, and the interlayer can be passed through different cold and heat sources (refrigerated liquid, hot water or hot oil) for cyclic heating or cooling reaction. Through the interlayer of the reactor, a constant temperature (high or low temperature) hot melt or cooling medium is injected to heat or cool the materials in the reactor at a constant temperature. At the same time, the stirring reaction can be carried out under normal pressure or negative pressure according to the requirements of use. The materials are reacted in the reaction kettle, and the evaporation and reflux of the reaction solution can be controlled. After the reaction is completed, the materials can be discharged from the discharge port at the bottom of the kettle, and the operation is extremely convenient.

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