Abstract: A mesostructured aluminosilicate material is described, constituted by at least two spherical elementary particles, each of said spherical particles being constituted by a matrix based on silicon oxide and aluminium oxide, having a pore size in the range 1.5 to 30 nm, a Si/Al molar ratio of at least 1, having amorphous walls with a thickness in the range 1 to 20 nm, said spherical elementary particles having a maximum diameter of 10 ?m. A process for preparing said material and its application in the fields of refining and petrochemistry are also described.

Abstract: An organic/inorganic hybrid material (OIHM) that consists of elementary spherical particles is described, whereby each of said spherical particles consists of a mesostructured matrix that is based on silicon oxide and organic groups with reactive terminal groups that are linked covalently to the inorganic structure, whereby said mesostructured matrix has a pore size of between 1.5 and 30 nm and has amorphous walls with a thickness of between 1 and 20 nm. Said elementary spherical particles have a maximum diameter of 10 ?m. The matrix that is based on silicon oxide can contain aluminum, titanium, zirconium and cerium. Two methods for preparation of said material are also described.

Abstract: A mesostructured material that consists of at least two elementary spherical particles, each of said particles comprising a mesostructured matrix based on aluminum oxide and having a pore size of between 1.5 and 30 nm, an aluminum oxide content that represents more than 46% by weight relative to the mass of said matrix, which has amorphous walls with a thickness of between 1 and 30 nm and whereby said elementary spherical particles have a maximum diameter of 10 ?m, is described. Said mesostructured matrix can also contain silicon oxide. Each of the spherical particles of the mesostructured material can also contain zeolitic nanocrystals so as to form a material with a mixed porosity that is both mesostructured and zeolitic in nature. The preparation of said material is also described.

Abstract: An inorganic material that consists of at least two elementary spherical particles, each of said spherical particles comprising metal nanoparticles that are between 1 and 300 nm in size and a mesostructured matrix with an oxide base of at least one element X that is selected from the group that consists of aluminum, titanium, tungsten, zirconium, gallium, germanium, tin, antimony, lead, vanadium, iron, manganese, hafnium, niobium, tantalum, yttrium, cerium, gadolinium, europium and neodymium is described, whereby said matrix has a pore size of between 1.5 and 30 nm and has amorphous walls with a thickness of between 1 and 30 nm, said elementary spherical particles having a maximum diameter of 10 ?m. Said material can also contain zeolitic nanocrystals that are trapped within said mesostructured matrix.

Abstract: A mesostructured aluminosilicate material is described, constituted by at least two spherical elementary particles, each of said spherical particles being constituted by a matrix based on silicon oxide and aluminium oxide, having a pore size in the range 1.5 to 30 nm, a Si/Al molar ratio of at least 1, having amorphous walls with a thickness in the range 1 to 20 nm, said spherical elementary particles having a maximum diameter of 10 ?m. A process for preparing said material and its application in the fields of refining and petrochemistry are also described.

Abstract: A material with a hierarchical porosity is described, constituted by at least two spherical elementary particles, each of said spherical particles comprising zeolitic nanocrystals having a pore size in the range 0.2 to 2 nm and a matrix based on silicon oxide, which is mesostructured, having a pore size in the range 1.5 to 30 nm and having amorphous walls with a thickness in the range 1 to 20 nm, said spherical elementary particles having a maximum diameter of 10 ?m. the matrix based on silicon oxide may contain aluminium. The preparation of said material is also described.