Patent ID: 8048389
Filing Date: 2011-11-01
Classification: B01D,B01J,C01G,C01P,Y02T

Abstract:
1. A method for producing a cerium oxide-zirconium oxide-based mixed oxide comprising: a first step of adding a sulfating agent to a cerous salt to obtain a slurry containing a cerous sulfate-alkali metal mixed salt; a second step of adding a cerium salt and a zirconium salt to the slurry; a third step of adding an alkali to the mixture obtained in the second step to obtain a mixed hydroxide containing (a) cerium hydroxide and (b) zirconium hydroxide mixed with cerium hydroxide; and a fourth step of heat-treating the mixed hydroxide to obtain a mixed oxide containing (a) cerium oxide and (b) zirconium oxide solid solution containing cerium; the cerium oxide-zirconium oxide-based mixed oxide comprising (a) cerium oxide and (b) zirconium oxide solid solution containing cerium, wherein (1) the weight ratio of CeO