B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 23/10 (2006.01) B01D 53/94 (2006.01) B01J 21/06 (2006.01) B01J 35/10 (2006.01) B01J 37/03 (2006.01) B01J 37/08 (2006.01)
Patent
CA 2652137
The composition of the invention consists essentially of oxides of zirconium, cerium and lanthanum and of another rare earth chosen from among yttrium, gadolinium and samarium with a proportion of the lanthanum oxide and the oxide of the other rare earth of at least 15%, and has specific surfaces of at least 40 m2/g and at least 15 m2/g after calcination respectively for 4 hours at a 1000°C and 10 hours at 1150°C. After calcination for 10 hours at 1200°C it has a surface of at least 7m2/g. This surface is at least 5 m2/g for an embodiment in which after 10 hours of calcination at 1150°C the composition is in the form of a pure solid solution. This composition can be used as a catalyst or a catalyst support.
La composition de l'invention consiste essentiellement en des oxydes de zirconium, de cérium, de lanthane et d'une autre terre rare choisie parmi l'yttrium, le gadolinium et le samarium avec une teneur en oxyde de lanthane et en oxyde de l'autre terre rare d'au moins 15% et elle présente des surfaces spécifiques d'au moins 40 m2/g et d'au moins 15 m2/g après calcination respectivement 4 heures à 1000°C et 10 heures à 1150°C. Après calcination 10 heures à 1200°C elle présente une surface d'au moins 7 m2/g. Cette surface est d'au moins 5 m2/g pour un mode de réalisation dans lequel après calcination 10 heures à 1150°C la composition est sous forme d'une solution solide pure. Cette composition peut être utilisée comme catalyseur ou support de catalyseur.
Larcher Olivier
Rohart Emmanuel
Verdier Stephan
Rhodia Operations
Robic
LandOfFree
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