Method for preparing a light olefin using an oxygen-containing compound, and device for use thereof

摘要

The present invention relates to a method for preparing a light olefin using an oxygen-containing compound, and device for use thereof. More specifically, the present invention provides a method for using an oxygen-containing compound to prepare a light olefin, taking methanol and/or dimethyl ether as main starting materials, using a multi-stage (n≥2) dense phase fluidized bed reactor and a multi-stage (m≥2) catalyst regenerator; the invention solves the problems in the prior art of the uniformity of catalyst carbon deposition and carbon content being difficult to control and light olefin selectivity being low.