HIGH SPECIFIC SURFACE AREA MIXED OXIDE OF CERIUM AND OF ANOTHER RARE EARTH, PREPARATION METHOD AND USE IN CATALYSIS

摘要

The mixed oxide of the invention mainly consists of cerium oxide and of atleast one oxide of another rare earth.It has a specific surface area of at least 20 m2/g after calcining at1000° C for 5 hours. It is obtained by forming a liquid mediumcomprising a cerium compound; by heating this medium; by adding to theprecipitate obtained a compound of the other rare earth,by heating the medium thus obtained and by bringing its pH to a basic valueand by calcining the precipitate. The mixed oxide maybe used as a catalyst support.