C - Chemistry – Metallurgy – 01 – F
Patent
C - Chemistry, Metallurgy
01
F
C01F 17/00 (2006.01) B01J 23/10 (2006.01) B01J 32/00 (2006.01)
Patent
CA 2691299
The mixed oxide of the invention mainly consists of cerium oxide and of at least one oxide of another rare earth. It has a specific surface area of at least 20 m2/g after calcining at 1000° C for 5 hours. It is obtained by forming a liquid medium comprising a cerium compound; by heating this medium; by adding to the precipitate obtained a compound of the other rare earth, by heating the medium thus obtained and by bringing its pH to a basic value and by calcining the precipitate. The mixed oxide may be used as a catalyst support.
L'invention concerne un oxyde mixte qui est principalement constitué d'oxyde de cérium et d'au moins un oxyde d'une autre terre rare. L'oxyde mixte présente une surface spécifique d'au moins 20 m2/g après calcination à 1000 OC pendant 5 heures. On obtient l'oxyde mixte en formant un milieu liquide contenant un composé de cérium ; en chauffant ce milieu ; en ajoutant au précipité obtenu un composé de l'autre terre rare, en chauffant le milieu ainsi obtenu en amenant son pH à une valeur basique, et en calcinant le précipité. L'oxyde mixte peut être utilisé en tant que support de catalyse.
Ohtake Naotaka
Yokota Kazuhiko
Anan Kasei Co. Ltd.
Ridout & Maybee Llp
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