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For the production of para-xylene, the alkylation reaction of benzene or catalysts and production method thereof used in the alkylation reaction or the disproportionation of toluene toluene and para-xylene manufacturing method using the same
For the production of para-xylene, the alkylation reaction of benzene or catalysts and production method thereof used in the alkylation reaction or the disproportionation of toluene toluene and para-xylene manufacturing method using the same
PROBLEM TO BE SOLVED: To provide a new catalyst having a molecular sieve effect (or shape selectivity) and excellent catalytic activity, and to provide a process for efficiently producing high-purity para-xylene even when an isomerization step and/or an adsorption separation step are not carried out.;SOLUTION: The catalyst comprises cores constituted of zeolite particles having 10 m particle diameter and a zeolite layer for covering each core. The catalyst is characterized in that the outermost surface has 800 silica/alumina ratio and the cores constituted of the zeolite particles have 300 average silica/alumina molar ratio when measured by X-ray photoelectron spectroscopy, and the concentration of aluminum in the zeolite layer increases inward from the outside surface. The process for producing para-xylene comprises a step of bringing benzene and/or toluene into contact with the catalyst to perform an alkylation or disproportion reaction.;COPYRIGHT: (C)2012,JPO&INPIT
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