Hierarchical porous material, useful to prepare absorbent and catalyst, comprises two spherical elementary particles, where at least one of the spherical particles comprise a silicon oxide based matrix and having amorphous walls

摘要

Hierarchical porous material comprises two spherical elementary particles having a maximum diameter of 200 microns, where at least one of the spherical particles comprise a silicon oxide based matrix and having amorphous walls, the material has a macroporous volume measured by mercury porosimetry of 0.05-1 ml/g, a mesoporous volume measured by nitrogen volumetry of 0.01-1 ml/g and a microporous volume measured by nitrogen volumetry of 0.03-0.4 ml/g. An independent claim is included for a preparation of the material, comprising preparing a clear solution containing precursor elements of zeolite germs, such as structuring agent, at least a silica precursor and optionally at least a precursor of an element X comprising aluminum, iron, boron, indium and gallium, mixing at least one surfactant and the clear solution into a solution, spraying the solution by aerosol obtained in the mixing step for the formation of spherical droplets, drying the droplets, and eliminating the structuring agent and the surfactant to obtain an amorphous material with hierarchical porosity in the range of microporosity, mesoporosity and macroporosity.