| abstract |
(57) 【Abstract】 PROBLEM TO BE SOLVED: Disproportionation reaction of alkyl aromatic hydrocarbon and / Alternatively, it provides a catalyst that results in improved catalytic performance, especially selectivity, in the transalkylation reaction of alkylaromatic hydrocarbons. The present invention comprises at least one element T (preferably aluminum) selected from the group consisting of gallium and aluminum, and silicon, and the total Si / The T atomic ratio is 5 to 100, preferably 6 to 80, more preferably 8 to 60, and the Si / T atomic ratio of the framework structure is such that the number of extralattice T atoms is the total T atoms contained in the zeolite. A zeolite having a mazite structure, preferably less than 10%, which is less than 15%, preferably less than 10%, of the number (that is, the sum of the number of extra-lattice T atoms and the number of T atoms of the crystal skeleton structure), preferably zeolite omega. |