COMPOSITE OXIDE CONTAINING CERIUM AND ALUMINUM AND ITS PRODUCTION

摘要

PURPOSE:To obtain the titled composite oxide having superior tertiary purifying power and a high rate of conversion of CO and useful in a water gas shift reaction by mixing carbonate of Ce with nitrate of Al in an aqueous medium and drying and baking the mixture. CONSTITUTION:Carbonate of cerium such as cerium carbonate is added to an aqueous soln. of nitrate of aluminum such as Al(NO3)3<9H2O so as to regulate the atomic ratio of Ce/Al to 1-20. After benzene is added as required, they are well mixed, concd. and dried at <= about 200 deg.C. The dried product is baked at 300-700 deg.C in the air to obtain a composite oxide contg. Ce and Al. The infrared absorption spectrum of the oxide has a peak at about 1,380cm<-1>.