COMPOSITION BASED ON ZIRCONIUM OXIDE AND OXIDES OF CERIUM, LANTHANUM AND OF ANOTHER RARE EARTH, A METHOD FOR PREPARING SAME AND USE THEREOF AS CATALYST

摘要

The invention relates to a composition based on zirconium and cerium oxides in a Zr / Ce 1 atomic ratio, and further comprising lanthanum oxide and a rare earth oxide other than cerium and lanthanum, characterized in that after calcination for 6 hours at 1150 ~ C it has a specific surface area of at least 10 m2 / g. The composition is obtained by forming a mixture comprising a sol of a zirconium compound and cerium, lanthanum and rare earth compounds, by bringing this mixture into contact with a solution of a basic compound, by heating and calcining the precipitate thus obtained. The composition can be used as a catalyst.