Patent ID: 6682706
Filing Date: 2004-01-27
Classification: B01D,B01J,C01G,C01P,Y02A,Y02T

Abstract:
A catalytic converter for cleaning exhaust gas comprising:a heat-resistant support; and a coating formed on the support, the coating including a zirconium oxide and at least one kind of catalytically active substance supported on the zirconium oxide; wherein the zirconium oxide having a pre-aging specific surface area I and a post-aging specific surface area A; wherein A/I&gE;0.4 and I&gE;40 m2/g when the aging is performed in an atmosphere of 1,000Â° C. for 5 hours; and wherein the zirconium oxide is a zirconium complex oxide represented by the following formula, Zr1âˆ’(x+y)CexRyOxide â€ƒWhere R represents a rare earth element other than Ce or an alkaline earth metal, the zirconium complex oxide meeting 0.12&lE;x&lE;0.25 and 0.02&lE;y&lE;0.15 in said formula.