This utility model discloses a pretreatment device for raw materials in the production of high-purity Kathon, relating to the field of Kathon production technology. The inlet of an ultrasonic reactor is connected via pipelines to a
methylchloroisothiazolinone raw material tank and a deionized water tank. The outlet of the ultrasonic reactor is connected via a
screw pump to a
ceramic membrane device. The
liquid phase outlet of the
ceramic membrane device is connected via pipelines to a
distillation column. The top
gas phase outlet of the
distillation column is connected via pipelines to a light component tank, an
organic solvent tank, and a purified
methylchloroisothiazolinone tank. This device achieves effective separation and purification of different components, improving product purity, while simultaneously recovering organic solvents and reducing production costs.