摘要：

The invention concerns a mesostructured material consisting of at least two elementary spherical particles, each of said particle including a mesotructured matrix based on aluminum oxide, having a size of pores ranging between 1.5 and 30 nm, an aluminum oxide content representing more than 46 wt. % based on the weight of said matrix, which has amorphous walls of thickness ranging between 1 and 20 nm, said elementary spherical particles having a maximum diameter or 10 νm. Said mesostructured matrix may also contain silicon oxide. Each of the spherical particles of the mesostructured material may also contain zeolite nanocrystals so as to form a material with mixed porosity of both mesostructured and zeolitic-type porosity. The invention also concerns the preparation of said material.

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