CATALYST SUPPORTING FILTER FOR PURIFYING EXHAUST GAS AND ITS PRODUCTION

摘要

PROBLEM TO BE SOLVED: To provide an exhaust gas purifying catalyst supporting filter low in pressure loss and not generating the waste of a catalyst, and to provide a method for producing the exhaust gas purifying catalyst supporting filter having an advantage capable of easily controlling the amt. of a catalyst supported on the metal fiber filter and capable of efficiently supporting the catalyst only on the surface of the filter within a short time. SOLUTION: A catalyst-containing slurry is sprayed on the surface of a metal fiber filter to obtain a catalyst supporting filter having a constitution such that the catalyst is supported only on the surface of the metal fiber filter. When this catalyst supporting filter is produced, the catalyst-containing slurry (a solvent and the catalyst are mixed) is sprayed on the metal fiber filter 9 by a spray device using a spray nozzle 3 and the metal fiber filter 9 after the spraying of the slurry is dried and baked to support the catalyst only on the surface of the metal fiber filter 9.