B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 23/00 (2006.01) B01D 53/94 (2006.01) B01J 21/06 (2006.01) B01J 23/10 (2006.01) B01J 37/03 (2006.01)
Patent
CA 2440083
Mixed oxides of cerium oxide and zirconium oxides having a high oxygen storage and high oxygen release rate are disclosed. The mixed oxides are made of polycrystalline particles of cerium oxide and zirconium oxide having a controlled domain structure on the subcrystalline level wherein adjacent domains within a single crystallite have a different ratio of zirconium and cerium. The mixed oxides are prepared by a co-precipitation technique using mixed salt solutions of cerium and zirconium having a solid content of at least 23 %, based on an oxide basis.
L'invention concerne des oxydes mixtes d'oxyde de cérium et d'oxydes de zirconium à stockage d'oxygène élevé et à taux de libération d'oxygène élevé. Ces oxydes mixtes sont fabriqués à partir de particules polycristallines d'oxyde de cérium et d'oxydes de zirconium à structure de domaine contrôlée au niveau sous-cristallin, les domaines adjacents à l'intérieur d'une cristallite unique possédant un rapport différent de zirconium et de cérium. Les oxydes mixtes sont préparés au moyen d'une technique de co-précipitation utilisant des solutions salines de cérium et de zirconium mixtes à teneur en matière solide d'au moins 23 %, basée sur une base d'oxyde.
Brezny Rasto
Egami Takeshi
Koranne Manoj M.
Mamontov Eugene
Gowling Lafleur Henderson Llp
W.r. Grace & Co. -Conn.
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