OXYGEN STORAGE MATERIAL HAVING HIGH TEMPERATURE STABILITY AND ITS PRODUCTION

PROBLEM TO BE SOLVED: To obtain an oxygen storage material having high temp. stability used for the purification of exhaust gas from an internal combustion engine. SOLUTION: The oxygen storage material contains cerium oxide and at least one stabilizer selected from the group comprising praseodymium...

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Hauptverfasser:	MUSSMANN LOTHAR DR, KREUZER THOMAS DR, LOX EGBERT DR, LINDNER DIETER DR, VAN YPEREN RENEE DR
Format:	Patent
Sprache:	eng
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS COMPOUNDS THEREOF CONCRETE INORGANIC CHEMISTRY LIME, MAGNESIA METALLURGY NON-METALLIC ELEMENTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL REFRACTORIES SEPARATION SLAG THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To obtain an oxygen storage material having high temp. stability used for the purification of exhaust gas from an internal combustion engine. SOLUTION: The oxygen storage material contains cerium oxide and at least one stabilizer selected from the group comprising praseodymium oxide, lanthanum oxide, yttrium oxide and neodymium oxide and has >=20 m /g, advantageously >=30 m /g specific surface area even after firing at 900 deg.C for 10 hr in air. One or more such stabilizers and, optionally, the cerium oxide exist in a highly dispersed form on the surface of a carrier material having a large surface area. The oxygen storage material has high temp. stability, is excellent in long-time stability, can easily be produced and can be used in the production of an exhaust gas purification catalyst.