Mesoporous Al-SU-X aluminosilicates have been prepared through a two step route using preformed zeolite like nanoclusters and TX-100 as the inorganic source and mesostructure-directing agent respectively, and characterized by XRD, HRTEM, N₂ adsorption desorption isotherm, ²⁷Al MAS NMR, NH₃-TPD and so on. Characterization results and catalytic data in cumene cracking indicated that aluminum atoms had been successfully incorporated into the framework of MSU-X, and it was responsible for high activity in cumene conversion.

Key words: two-step route, mesoporous material, cumene, catalysis