COMPOSITION BASED ON CERIUM AND ZIRCONIUM OXIDES HAVING A SPECIFIC SURFACE WHICH IS STABLE BETWEEN 900°C AND 1000°C, METHOD FOR THE PRODUCTION AND USE THEREOF AS A CATALYST

Composition comprising cerium oxide and zirconium oxide in a weight ratio of 10/90 to 90/10 has a surface area which, after a first calcination at 900[deg]C for 4 hours and then a second calcination at 1000[deg]C for 10 hours, varies by no more than 20%. Independent claims are also included for: (1)...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	ROHART, EMMANUEL, MONIN, DAVID, LARCHER, OLIVIER
Format:	Patent
Sprache:	eng ; fre ; ger
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 CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS CONCRETE INORGANIC CHEMISTRY LIME, MAGNESIA METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL REFRACTORIES SEPARATION SLAG THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OF NATURAL STONE
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	Composition comprising cerium oxide and zirconium oxide in a weight ratio of 10/90 to 90/10 has a surface area which, after a first calcination at 900[deg]C for 4 hours and then a second calcination at 1000[deg]C for 10 hours, varies by no more than 20%. Independent claims are also included for: (1) composition comprising cerium oxide and zirconium oxide in a cerium oxide/zirconium oxide weight ratio of 0.24-4 and at least one other rare earth metal oxide in an amount of up to 30 wt.%, with a surface area which, after a first calcination at 900[deg]C for 4 hours and then a second calcination at 1000[deg]C for 10 hours, varies by no more than 15%; (2) a process for producing the composition; (3) a catalyst system comprising the composition; (4) internal combustion engine exhaust gas treatment using the composition as a catalyst.