PROCESS FOR THE PREPARATION OF AN OLEFIN

摘要

Process for the preparation of an olefin comprising a) reacting a combination of an oxygenate feed selected from the group consisting of alcohols and ethers, and an olefinic co-feed in a reactor in the presence of a one-dimensional zeolite having 10-membered ring channels to prepare an olefinic reaction mixture; b) separating the olefinic reaction mixture into at least a first olefinic product fraction and a second olefinic fraction containing olefins with 4 or more carbon atoms; and c) recycling at least part of the second olefinic fraction obtained in step b) to step a) as olefinic co-feed.