Inorganic oxides with combined mesoporosity or mesoporosity and microporosity and process for preparing them

摘要

A process for producing an inorganic oxide containing micropores and mesopores, comprising: heating a mixture comprising water, an inorganic oxide precursor and at least one compound that binds to the inorganic oxide through the formation of hydrogen bonds and an agent of template formation to produce micropores, the template forming agent being an organic compound containing an element of Group VA of the periodic table of the elements and at least one alkylene, alkyl or aryl group having 1 to 8 carbon atoms said heating being at a temperature and for a period to produce an inorganic oxide containing both micropores and mesopores, in which the inorganic oxide is an amorphous silicate, and in which said compound is a glycol, which has a boiling point. of at least 150 ° C, and which is selected from the group consisting of glycerol, diethylene glycol, triethylene glycol and tetraethylene glycol, and in which and the mixture additionally contains a source of ions selected from the group of elements of groups IVB, VB, VIB, VIIB, VIIIB, IB, IIB and IIIA, and in which the heating includes keeping the mixture at the boiling point of water to evaporate water and volatile organic compounds of the inorganic oxide precursor thereof, followed by calcining at a temperature above 300 ° C.