CATALYST CLEANING METHODS, CATALYST CLEANING EQUIPMENT, AND PROGRAM STORAGE MEDIA

Abstract

The invention relates to a method for cleaning a catalyst, which includes: a step of supporting a honeycomb-structured catalyst above the cleaning fluid such that the open surface of the catalyst and the surface of the cleaning fluid face each other; and a step of lowering the catalyst to be immersed in the cleaning fluid, wherein the immersion step, the time until the entire catalyst is immersed in the cleaning fluid after the catalyst comes into contact with the cleaning fluid is 5 minutes or longer. Thus, the cleaning fluid gradually penetrates from the lower open surface of the catalyst and the air that has entered the catalyst escapes from the upper open surface of the catalyst.