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 invention has the cerium oxide content of up to 50% by weight , zirconium , cerium and other cerium another including a rare-earth oxide and , 1000 maximum temperature and reducing the maximum 500 after calcination for 6 hours at 45 m ² / g relates to a composition characterized in that it has the least surface area. Composition which comprises including zirconium , cerium and other rare earth and a mixture of the compound with a basic compound and reaction continuously for a residence time that does not exceed 100 milliseconds, wherein heating the precipitate in contact with the surface active agent before calcination are prepared by a .