Process for the preparation of an olefin

Details Process for the preparation of an olefin Process for the preparation of an olefin

B - Operations, Transporting

01

J

B01J 8/04 (2006.01) B01J 8/26 (2006.01) C07C 1/20 (2006.01) C07C 11/02 (2006.01)

Patent

CA 2704996

An olefin is prepared from an alkyl alcohol in a process, comprising the steps: a) converting the alkyl alcohol into a dialkylether over a first catalyst, to yield a dialkylether product stream containing alkyl alcohol, dialkylether and water; b) separating the dialkylether product stream into a vaporous dialkylether-rich stream and a liquid water-containing stream which water-containing stream comprises at most 5 %wt of alkyl alcohol, based on the total weight of water and alkyl alcohol; and c) converting the vaporous dialkylether-rich stream to an olefin over a second catalyst, wherein the dialkylether product stream is enriched with a base.

La présente invention concerne un procédé de préparation d'une oléfine à partir d'un alcool d'alkyle, le procédé comprenant les étapes consistant a) à transformer l'alcool d'alkyle en un dialkyléther au moyen d'un premier catalyseur, afin d'obtenir un flux de produit à base de dialkyléther contenant de l'alcool d'alkyle, du dialkyléther et de l'eau ; b) à séparer le flux de produit à base de dialkyléther en un flux riche en dialkyléther en phase vapeur et en un flux liquide contenant de l'eau, ledit flux contenant de l'eau comprenant au maximum 5 % en poids d'alcool d'alkyle sur la base du poids total de l'eau et de l'alcool d'alkyle ; et c) à transformer le flux riche en dialkyléther en phase vapeur en une oléfine au moyen d'un second catalyseur, le flux de produit à base de dialkyléther étant enrichi au moyen d'une base.

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