Fluid bed reactor with staged baffles

摘要

The invention relates to a process of alkylating aromatic hydrocarbons, and more particularly a process of making paraxylene by alkylation of benzene and/or toluene with methanol and/or dimethyl ether, and to an apparatus for carrying out said process, the improvement comprising staged injection of one of the reactants, with the stages separated by structured packing so as to minimize at least one of gas phase back-mixing, by-pass phenomena, and gas bubble size.

主权项

1. In a fluid bed reactor system for the manufacture of xylene by an alkylation reaction comprising contact of an alkylating agent selected from methanol, dimethyl ether, and mixtures thereof with an aromatic hydrocarbon selected from benzene, toluene, and mixtures thereof, in the presence of a catalyst that promotes said alkylation reaction, the improvement comprising the staged injection of at least one of said alkylating agent and said aromatic hydrocarbon, wherein said reactor system is characterized by plural injection stages separated by baffle material, said baffle material characterized as suitable to decrease at least one of gas phase back-mixing, by-pass phenomena, and gas bubble size in the manufacture of xylene by said alkylation reaction but allow said catalyst to pass through said baffle material.