Preparation tank of 2, 6-dichlorobenzonitrile capable of automatically adding catalyst

The invention provides a 2, 6-dichlorobenzonitrile preparation tank capable of automatically adding a catalyst, and relates to the technical field of paint spraying. The inner side tank body is mounted in the outer side tank body; a conveying pipe is mounted on the outer side of the inner side tank body; a feeding mechanism is mounted in the conveying pipe; a sliding mechanism is mounted in the outer side tank body, and water vapor generated between the outer side tank body and the inner side tank body is used as power for pushing the sliding mechanism, so that a circular bulge below a sliding rod opens or blocks a feeding opening, and the device can automatically add a catalyst into the preparation tank according to the degree of chemical reaction in a pipe; the catalyst adding device is used for controlling the adding amount of a catalyst, waste caused by excessive adding of the catalyst is avoided, and the problems that a traditional preparation tank cannot automatically add the catalyst at the beginning o