Patent ID: 9656421
Date: 2017-05-23
CPC Classifications: B01J,B29C,C01B,C10G,Y02P

Claim:
1. A process for the preparation of an inorganic material with a hierarchical porosity in the micropore and mesopore domains, said material being constituted by at least two elementary spherical particles having a maximum diameter of 200 microns, each of said spherical particles comprising metallic particles containing at least one or more metals selected from vanadium, niobium, tantalum, molybdenum, tungsten, iron, copper, zinc, cobalt and nickel, said metallic particles being present within a matrix, which is mesostructured, based on silicon oxide, having microporous walls with a thickness in the range 1 to 60 nm, said process comprising at least the following steps: a) preparing a solution containing zeolitic nanocrystals with a maximum nanometric dimension equal to 60 nm based on silicon and/or precursor elements of proto-zeolitic entities based on silicon; b) mixing, in solution, said metallic particles or at least one metallic precursor of said metallic particles, at least one surfactant and at least said solution obtained in accordance with a) such that the ratio of the volumes of inorganic and organic materials, V c) aerosol atomization of said solution obtained in step b) in order to result in the formation of spherical particles; d) drying said particles; g) eliminating any remaining precursor elements of proto-zeolitic entities based on silicon and at least said surfactant; h) regenerating said metallic particles to the form of a polyoxometallate which have decomposed during step g); and i) drying the regenerated particles;