| abstract |
The present invention relates to a parasitic system comprising benzene, methanol and / or dimethyl ether, comprising a first distributor located at the bottom of the fluidized bed and a second distributor located at least in one region downstream of the gas flow direction of the first distributor. Disclosed is a fluid bed reactor for the production of xylenes and the simultaneous production of low carbon olefins. The present invention comprises the steps of (1) stream (A) entering the reaction zone of the fluidized bed reactor through the first distributor; (2) stream B entering the reaction zone of the fluidized bed reactor via a second distributor; And (3) contacting the reactants with the catalyst in the reaction zone to produce a gaseous stream comprising paraxylene and low carbon olefins; Disclosed is a method for preparing paraxylene and preparing a low carbon olefin simultaneously. The present invention controls mass transfer to coordinate, optimize and synergize the competition between benzene alkylation and MTO reactions, significantly improving the conversion of benzene and the yield of paraxylene. |