Crystalline aluminosilicate zeolite and process for production thereof

摘要

A novel crystalline aluminosilicate zeolite characterized by having (a) a silica/alumina mole ratio in the range of from 10 to 100, (b) X-ray lattice distances d shown in Table A in the specification, and (c) a (cyclohexane/n-hexane) adsorption ratio of at least 0.7. This crystalline aluminosilicate zeolite is useful, for example, as a catalyst in the isomerization reaction or transalkylation reaction of alkylbenzenes or alkylnaphthalenes, and can be prepared by heating a crystalline aluminosilicate zeolite ZSM-5 having a silica/alumina mole ratio of from 20 to 300 at a temperature between 80 DEG C. and 250 DEG C. in an aqueous solution containing 0.1 to 1 g, per gram of the ZSM-5 zeolite, of an alkali metal hydroxide.