Selective hydrocarbon hydrogenation catalyst and process

Details Selective hydrocarbon hydrogenation catalyst and process Selective hydrocarbon hydrogenation catalyst and process

C - Chemistry, Metallurgy

07

C

C07C 7/167 (2006.01) B01J 23/44 (2006.01) B01J 23/50 (2006.01) B01J 23/58 (2006.01)

Patent

CA 2529940

This invention relates to acetylene removal catalysts and their use in the hydrogenating of highly unsaturated hydrocarbons to less unsaturated hydrocarbons in an olefin rich hydrocarbon stream in the presence of hydrogen and a catalyst composition under conditions effective to convert said highly unsaturated hydrocarbon to a less unsaturated hydrocarbon. Said catalyst composition comprises palladium, silver, potassium, and an inorganic support material, wherein the catalyst composition contains less than about 0.3 weight % potassium. In the presence of sulfur-containing impurities, the catalysts of the present invention yield a much smaller increase in T1 (cleanup temperature) and higher ethylene selectivity is achieved.

La présente invention concerne des catalyseurs d'élimination d'acétylène et leur utilisation dans l'hydrogénation d'hydrocarbures hautement insaturés en hydrocarbures moins insaturés dans un flux d'hydrocarbures riche en oléfines en présence d'hydrogène et d'une composition de catalyse, dans des conditions efficaces pour convertir lesdits hydrocarbures hautement insaturés en hydrocarbures moins insaturés. Ladite composition de catalyse contient du palladium, de l'argent, du potassium et une matière de support inorganique. Elle renferme, notamment, moins d'environ 0,3 % en poids de potassium. En présence d'impuretés contenant du soufre, les catalyseurs de cette invention engendrent une augmentation beaucoup moins importante de la température de nettoyage (T1) et une sélectivité d'éthylène supérieure est obtenue.

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