Patent ID: 7871956
Filing Date: 2011-01-18
Classification: B01D,B01J,C01G,C01P,Y02T

Abstract:
1. A cerium/zirconium-base composite oxide comprising: cerium and zirconium, the cerium/zirconium-base composite oxide being made by a step for melting the starting material mixture at a temperature of 2000° C. or greater to be molten and satisfying requirements (1) an oxygen release initiation temperature is 380° C. or below, (2) an oxygen release amount is not less than 485 μmol/g, and further (3) an oxygen release amount at 400° C. is not less than 15μmol/g, and the cerium/zirconium-base composite oxide exhibits a large crystalline structure and when calcined at a high of 1050° C. and a high of 1150° C. in air, has a main peak at both temperatures, relevant to Zr