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Abstract

The invention relates to a process and a plant for producing an olefins-containing hydrocarbon product by reaction of an oxygenates-containing reactant mixture, which is divided into a plurality of reactant mixture substreams, in a multi-stage oxygenate-to-olefin (OTO) synthesis reactor comprising a plurality of serially connected reaction sections comprising catalyst zones, wherein a feeding apparatus for a reactant mixture substream is arranged upstream of each catalyst zone. In each of these reaction sections a reactant mixture substream is introduced and therein under oxygenates conversion conditions converted into olefins and further hydrocarbons, wherein all reaction sections save for the first are additionally supplied with the product stream from the respective upstream reaction section. In addition at least one steam stream is introduced into at least one reaction section and at least one hydrocarbons-containing recycle stream is introduced into at least one reaction section. The OTO synthesis reactor product is fractionated in a multi-stage workup apparatus to obtain a plurality of hydrocarbon product fractions of which at least one is recycled to the OTO synthesis reactor as a recycle stream. According to the invention all reactant mixture substreams, steam streams and recycle streams are introduced into the OTO synthesis reactor in gaseous/vaporous form.

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First Claim