Ethylene production from acetic acid utilizing dual reaction...

C - Chemistry – Metallurgy – 07 – C

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C07C 1/24 (2006.01) C07C 11/04 (2006.01)

Patent

CA 2732500

A process for selective formation of ethylene from acetic acid includes contacting a feed stream containing acetic acid and hydrogen at an elevated temperature with a first catalytic composition including a suitable hydrogenating catalyst in a first reaction zone to form an intermediate mixture including ethanol and ethyl acetate; and subsequently reacting the intermediate mixture over a suitable dehydrating and/or cracking catalyst in a second reaction zone to form ethylene. Selectivities of ethylene of over 80 % are achieved.

Linvention concerne un procédé de production sélective déthylène à partir dacide acétique, consistant : à mettre en contact un flux dalimentation contenant de lacide acétique et de lhydrogène à une température élevée avec une première composition catalytique contenant un catalyseur dhydrogénation approprié, dans une première zone de réaction, pour obtenir un mélange intermédiaire contenant de léthanol et de lacétate déthyle ; puis à faire réagir ce mélange intermédiaire sur un catalyseur de déshydratation et/ou de craquage approprié, dans une deuxième zone de réaction, pour obtenir de léthylène. On obtient ainsi des sélectivités déthylène de plus de 80 %.

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