Patent ID: 7084091

Claim:
A method for producing a ceramic catalyst body by directly supporting a catalyst on a ceramic support containing a matrix phase consisting of a cordierite-W composite body and a dispersed phase consisting of compounds other than said cordierite-W composite body, comprising the steps of: dissolving a catalyst precursor in a solvent and preparing a catalyst solution containing a catalyst component consisting of a negative complex ion resulting from said catalyst precursor; adjusting a pH of said catalyst solution in such a manner as to satisfy the relation E 1 >E 2 and E 1 >0 where E 1 is a surface potential of the matrix phase of said ceramic support relative to the pH of said catalyst solution and E 2 is a surface potential of the dispersed phase of said ceramic support; bringing said ceramic support into contact with said catalyst solution to support said catalyst component on said ceramic support; and applying heat-treatment to bond the matrix phase consisting of said cordierite-W composite body and said catalyst component to directly support said catalyst on said ceramic support.