Metal oxides catalytic preparations obtained through...

Details Metal oxides catalytic preparations obtained through... Metal oxides catalytic preparations obtained through...

B - Operations, Transporting

01

J

B01J 27/22 (2006.01) B01J 23/28 (2006.01) B01J 37/02 (2006.01) B01J 37/12 (2006.01) B01J 37/16 (2006.01) B01J 37/18 (2006.01) C10G 35/06 (2006.01)

Patent

CA 2077316

The invention relates to a catalyst for chemical and petrochemical reactions and the process for producing the said catalyst. The catalyst consists of an oxide of one of the transition metals, rare earth elements or an actinide, such as molybdenum, with carbides and oxycarbides at the surface, and the metal or oxide forming the core. The process consists in passing a reactive gas mixture containing the carbon products for which we wish to perform the catalytic chemical conversion over the oxide at the reaction temperature. The carbon products present in the mixture cause gradual carbidization of the surface of the oxide and a gradual increase in catalyst effectiveness. This process can be applied in particular to the reforming of hydrocarbons for which the molybdenum oxide MoO3 is a preferred catalyst.

L'invention concerne un catalyseur pour les réactions chimiques et pétrochimiques et son procédé de fabrication. Le catalyseur comprend un oxyde d'un des métaux de transition, des terres rares ou d'un actinide, de molybdène par exemple, comportant en surface des carbures et oxycarbures, le coeur pouvant être le métal ou l'oxyde. Le procédé de fabrication consiste à faire passer sur l'oxyde un mélange gazeux réactionnel contenant des produits carbonés dont on veut opérer une transformation chimique catalytique à la température de réaction. Les produits carbonés présents dans le mélange provoquent une carburation progressive de la surface de l'oxyde et une augmentation progressive de l'efficacité du catalyseur. Ce procédé s'applique en particulier au réformage des hydrocarbures pour lequel l'oxyde de molybdène MOO3 constitue un catalyseur préféré.

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