In this experiment, two thermocouples were used for cascade control, and the PID temperature control device was used to control the temperature in the reactor and the outer wall of the reactor. The propeller stirrer can better mix the reactants. The stirring rate can be displayed on the control panel The two reactors are controlled in parallel, the purpose is to control the same reaction conditions to compare the effects of ultrasound and stirring, thermal reaction and hydrogenation reaction, thermal reaction and addition of alkaline additives on the product.