Patent ID: 7396513
Filing Date: 2008-07-08
Classification: C07C,C10G,Y02P

Abstract:
1. An apparatus for converting oxygenates to olefins which comprises: a fluidized bed reactor for contacting a feedstock comprising oxygenate with a catalyst comprising a molecular sieve under conditions effective to produce a deactivated catalyst having carbonaceous deposits and a product comprising said olefins; a separator for separating said deactivated catalyst from said product to provide a separated vaporous product which contains catalyst fines; a quench tower for quenching said separated vaporous product with a liquid medium containing water and catalyst fines, in an amount sufficient for forming a light product fraction comprising light olefins and catalyst fines and a heavy product fraction comprising water, heavier hydrocarbons and catalyst fines; a treater for treating said light product fraction by contacting with a liquid oxygenate substantially free of catalyst fines to provide a light product fraction having reduced catalyst fines content and a liquid fraction of increased fines content; a compressor for compressing said light product fraction having reduced catalyst fines content; and a recovery train for recovering said light olefins from said compressed light product fraction.