Olefin isomerization and metathesis catalyst

C - Chemistry – Metallurgy – 07 – C

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C07C 6/04 (2006.01) B01J 23/34 (2006.01) B01J 23/755 (2006.01) B01J 37/02 (2006.01) C07C 4/06 (2006.01) C07C 11/04 (2006.01)

Patent

CA 2733601

A process for the production of propylene, the process including: contacting ethylene and a hydrocarbon stream comprising 1-butene and 2-butene with a bifunctional isomerization-metathesis catalyst to concurrently isomerizes 1-butene to 2- butene and to form a metathesis product comprising propylene; wherein the bifunctional isomerization- metathesis catalyst comprises: a catalyst compound may include at least one element selected from tungsten, tantalum, niobium, molybdenum, nickel, palladium, osmium, iridium, rhodium, vanadium, ruthenium, and rhenium for providing metathesis activity on a support comprising at least one element from Group IA, HA, HB, and IIIA of the Periodic Table of the Elements; wherein an exposed surface area of the support provides both isomerization activity for the isomerization of 1- butene to 2-butene; and reactive sites for the adsorption of catalyst compound poisons. In other embodiments, the catalyst compound may include at least one element selected from aluminum, gallium, iridium, iron, molybdenum, nickel, niobium, osmium, palladium, phosphorus, rhenium, rhodium, ruthenium, tantalum, titanium, tungsten, and vanadium.

L'invention concerne un procédé de production de propylène, le procédé comprenant : la mise en contact d'éthylène et d'un courant d'hydrocarbures comprenant du 1-butène et du 2-butène avec un catalyseur de d'isomérisation-métathèse bifonctionnel pour simultanément isomériser le 1-butène en 2-butène et former un produit de métathèse comprenant du propylène. Le catalyseur d'isomérisation-métathèse bifonctionnel comprend un composé de catalyseur qui peut comprendre au moins un élément choisi parmi le tungstène, le tantale, le niobium, le molybdène, le nickel, le palladium, l'osmium, l'iridium, le rhodium, le vanadium, le ruthénium, et le rhénium pour conférer l'activité de métathèse sur un support comprenant au moins un élément des Groupes IA, IIA, IIB, et IIIA du tableau périodique des éléments. Une surface catalytique active exposée du support confère l'activité d'isomérisation du 1-butène en 2-butène et comprend des sites réactifs pour l'adsorption des poisons du composé de catalyseur. Dans d'autres modes de réalisation, le composé de catalyseur peut comprendre au moins un élément choisi parmi l'aluminium, le gallium, l'iridium, le fer, le molybdène, le nickel, le niobium, l'osmium, le palladium, le phosphore, le rhénium, le rhodium, le ruthénium, le tantale, le titane, le tungstène et le vanadium.

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