COMPOSITION CONTAINING OXIDES OF ZIRCONIUM, CERIUM AND ANOTHER RARE EARTH HAVING REDUCED MAXIMAL REDUCIBILITY TEMPERATURE, AND METHOD FOR PREPARING AND USING SAME IN THE FIELD OF CATALYSIS

摘要

the composition of the invention is based on oxides of zirconium, cerium and at least one other of the rare earth cu00e9hum with cerium oxide content of not more than 50% by mass, and it is after calcination at 1000 c, 6 hours, the maximum temperature of the ru00e9ductibilitu00e9 in a specific surface area of at least 45 m2 / g.it is prepared by a process in which we reacted continuously a mixture of compounds of zirconium, cerium and other rare earth compound with a base with a residence time of at most 100 milliseconds, and the precipitate is heated and brought into contact with a surfactant at after being calcined.