METHOD FOR THE SELECTIVE PRODUCTION OF PARA-DIALKYLBENZENES

摘要

A method is disclosed for selective simultaneous production of para-xylene, para-ethyltoluene and para-diethylbenzene from a reactant stream containing ethylbenzene and methanol, as an alkylating agent. The process comprises alkylation of the feedstock in a fluidized-bed rector under alkylating conditions, over a modified ZSM-5-based catalyst to produce streams containing above 95% para-isomers of dialkylbenzenes. The method also includes the steps of multilayer silylation to achieve simultaneous selectivity of the para-isomers of dialkylbenzenes.

主权项

1. A method for production of para-dialkylbenzenes comprising:
contacting a silylated solid zeolite catalyst in fluidized bed form in a fluidized-bed reactor with a reactant comprising ethylbenzene and methanol to alkylate the ethylbenzene present in the reactant to form a para-dialkylbenzene mixture; and wherein the silylated solid zeolite catalyst is obtained by silylating a zeolite with a silicon-containing agent to form a silicon-containing group bonded to the zeolite.