Catalytic composition for the dehydrogenation of...

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B01J 23/656 (2006.01) C07C 5/333 (2006.01)

Patent

CA 2469906

Process for the catalytic dehydrogenation of alkylaromatic hydrocarbons optionally mixed with ethane which comprises: A) dehydrogenating the hydrocarbon stream, optionally mixed with an inert gas, in a fluid bed reactor in the pres~ence of a catalytic composition based on gallium and manganese supported on alumina modified with silica, at a temperature ranging from 400 to 700~C, at a total pressure ranging from 0.1 to 3 ata and with a GHSV (Gas Hourly Space Velocity) ranging from 50 to 10,000 h-1; and B) regenerating and heating the catalyst, by means of the catalytic oxidation of a fuel, in a fluid bed regenera~tor at a temperature higher than 400~C.

L'invention concerne un procédé de déshydrogénation catalytique d'hydrocarbures alkylaromatiques éventuellement mélangés à de l'éthane. Ledit procédé comprend les étapes consistant : (A) à déshydrogéner le flux d'hydrocarbures, éventuellement mélangé à un gaz inerte, dans un réacteur à lit fluidisé, en présence d'une composition catalytique à base de gallium et de manganèse supportée sur de l'alumine modifiée avec de la silice, à une température comprise entre 400 et 700 ·C, à une pression totale comprise entre 0,1 et 3 ATA, et à une vitesse spatiale horaire de gaz (GHSV) comprise entre 50 et 10 000 h?-1¿ ; et (B) à régénérer et à chauffer le catalyseur, par oxydation catalytique d'un carburant, dans un régénérateur à lit fluidisé, à une température supérieure à 400 ·C.

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