C - Chemistry – Metallurgy – 01 – G
Patent
C - Chemistry, Metallurgy
01
G
C01G 23/04 (2006.01) B01D 53/56 (2006.01) B01J 21/06 (2006.01) B01J 37/08 (2006.01) C01B 25/02 (2006.01) C01G 23/047 (2006.01) C01G 23/08 (2006.01) C01G 25/00 (2006.01) C01G 25/02 (2006.01)
Patent
CA 2716556
The composition of the invention comprises at least one supported oxide, based on a zirconium oxide, a titanium oxide or a mixed zirconium titanium oxide on a silica-based support. The composition is characterized in that, after calcination for 4 hours at 900 °C, the supported oxide is in the form of particles deposited on said support, the size of the particles being at most 5 nm when the supported oxide is based on a zirconium oxide, being at most 10 nm when the supported oxide is based on a titanium oxide and being at most 8 nm when the supported oxide is based on a mixed zirconium titanium oxide. The composition of the invention may be used as catalyst, especially for the selective reduction of NOx.
La composition de l'invention comprend au moins un oxyde supporté, à base d'un oxyde de zirconium, d'un oxyde de titane ou d'un oxyde mixte de zirconium et de titane sur un support à base de silice. Elle est caractérisée en ce que, après calcination 4 heures à 900 C, l'oxyde supporté est sous forme de particules, déposées sur ledit support, dont la taille est d'au plus nm lorsque l'oxyde supporté est à base d'un oxyde de zirconium; d'au plus 10 nm lorsque l'oxyde supporté est à base d'un oxyde de titane et d'au plus 8 nm lorsque l'oxyde supporté est à base d'un oxyde mixte de zirconium et de titane. La composition de l'invention peut être utilisée comme catalyseur, notamment pour la réduction sélective des NOx.
Criniere Guillaume
Ifrah Simon
Jorge Coelho Marques Rui
Verdier Stephan
Rhodia Operations
Robic
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