B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 53/34 (2006.01) B01D 53/94 (2006.01) B01J 21/06 (2006.01) B01J 23/00 (2006.01) B01J 23/10 (2006.01) F01N 3/00 (2006.01)
Patent
CA 2725431
The invention relates to a composition containing zirconium, cerium and yttrium oxides with a cerium oxide proportion of between 3% and 15%, and yttrium oxide proportions corresponding to the following conditions: 6% at most if the cerium oxide proportion is between 12% excluded and 15% included; 10% at most if the cerium oxide proportion is between 7% excluded and 12% included; 30% at most if the cerium oxide proportion is between 3% and 7% included; the balance consisting of zirconium oxide. The composition may optionally include an oxide of a rare earth selected from lanthanum, neodymium and praseodymium. The composition can be used to treat exhaust gases from a vehicle.
La composition de l'invention est à base d'oxydes de zirconium, de cérium et d'ytthum avec une proportion en oxyde de cérium comprise entre 3% et 15% et des proportions en oxyde d'yttrium qui vérifient les conditions suivantes : au plus 6% si la proportion en oxyde de cérium est comprise entre 12% exclu et 15% inclus; au plus 10% si la proportion en oxyde de cérium est comprise entre 7% exclu et 12% inclus; au plus 30% si la proportion en oxyde de cérium est comprise entre 3 et 7% inclus; le complément en oxyde de zirconium. La composition peut comprendre aussi éventuellement un oxyde d'une terre rare choisie parmi le lanthane, le néodyme et le praséodyme. La composition peut être utilisée pour le traitement des gaz d'échappement d'automobile.
Ifrah Simon
Larcher Olivier
Rohart Emmanuel
Rhodia Operations
Robic
LandOfFree
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