Rare earth metals as oxidative dehydrogenation catalysts

B - Operations – Transporting – 01 – J

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B01J 23/00 (2006.01) B01J 23/10 (2006.01) B01J 23/63 (2006.01) C07C 5/48 (2006.01)

Patent

CA 2500631

Catalysts and methods useful for the production of olefins from alkanes via oxidative dehydrogenation (ODH) are disclosed. The ODH catalysts include a base metal selected from the group consisting of lanthanide metals, their oxides, and combinations thereof. The base metal is more preferably selected from the group consisting of samarium, cerium, praseodymium, terbium, their corresponding oxides and combinations thereof. The base metal loading is preferably between about 0.5 and about 20 weight percent and more preferably between about 2 and about 10 weight percent. Optionally, the ODH catalysts are further comprised of a Group VIII promoter metal present at trace levels. The Group VIII promoter metal is preferably platinum, palladium or a combination thereof and is preferably present at a promoter metal loading of between about 0.005 and about 0.1 weight percent. Optionally, the ODH catalyst is supported on a refractory support.

L'invention concerne des catalyseurs et des méthodes utiles de production d'oléfines à partir d'alcanes, par déshydrogénation oxydative (ODH). Les catalyseurs ODH comprennenr un métal de base sélectionné dans le groupe constitué par des lanthanides, leurs oxydes et leurs combinaisons. De préférence, le métal de base est sélectionné dans le groupe constitué par samarium, cérium, praséodyme, terbium, leurs oxydes correspondants et leurs combinaisons. La charge du métal de base est comprise, de préférence, entre environ 0,5 et 20 % en poids, et mieux, entre environ 2 et 10 % en poids. Facultativement, les catalyseurs ODH comprennent en outre un métal promoteur du groupe VIII présent au niveau de traces. Le métal promoteur du groupe VIII est, de préférence, du platine, du palladium ou leur combinaison. Il présent, de préférence, dans une charge du métal promoteur comprise entre environ 0,005 et 0,1 % en poids. Le catalyseur ODH est éventuellement disposé sur un support réfractaire.

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