Patent ID: 6060420
Filing Date: 2000-05-09
Classification: B01D,B01J,Y02T,Y10S

Abstract:
A catalyst for purifying exhaust gas discharged from an internal combustion engine comprising:a catalyst carrier substrate comprising .gamma.-alumina or zirconia; anda composite oxide of A-site defect perovskite structure represented by the following general formula:A.sub.1-.alpha. BO.sub.3-.delta.wherein A is at least one element selected from the group consisting of alkali metals, alkaline earth metals, rare earth elements, Y and Pb, and B is at least one element selected from the group consisting of Mn, Co, Ti, Fe, Ni, Cu and Al, and 0.12.ltoreq..alpha..ltoreq.0.15, 0<.delta..ltoreq.1.