B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 23/10 (2006.01) B01J 23/00 (2006.01) B01J 37/03 (2006.01) C01F 17/00 (2006.01) C01G 25/00 (2006.01) C01G 25/02 (2006.01) B01J 23/63 (2006.01)
Patent
CA 2379960
A novel process for the preparation of mixed oxide compositions of cerium oxide and at least one non-noble metal oxide is disclosed. The process involves contacting a salt solution containing a cerium (IV) salt with hydrogen peroxide and there-after, treating the resulting solution with excess base to precipitate a mixed oxides. Mixed oxide compositions produced by the process maintain a high specific surface area after prolonged exposure to high temperatures.
L'invention concerne un procédé permettant de préparer des compositions d'oxydes mixtes consistant en un oxyde de cérium et au moins un oxyde métallique non noble. Le procédé consiste à mettre en contact une solution saline contenant un sel de cérium (IV), avec du peroxyde d'hydrogène puis, à traiter la solution obtenue à l'aide d'un excédent de base de manière à précipiter les oxydes mixtes. Les compositions d'oxydes mixtes ainsi produites conservent une surface spécifique élevée après exposition prolongée à des températures élevées.
Brezny Rasto
Koranne Manoj M.
Gowling Lafleur Henderson Llp
W.r. Grace & Co.,-Conn.
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