Process for the preparation of a micro-mesoporous material with a high specific surface and controlled porosity distribution.

摘要

The present invention concerns a process for the preparation of a material MICRO-MESO POROUS, comprising: A) PREPARATION OF A MIXTURE USING A TETRAALQUILOORTOSILICATO, an alcohol or dialcohol alkyl C {SUB, 3} {SUB, 6}, a tetraalkylammonium hydroxide having the formula R {SUB 1} (R {SUB, 2}) {SUB, 3} N Uilo C {SUB, 3} {SUB, 3} AXES METALLIC IN THAT MOLAR RATIO are within the following ranges: 20; SUB {2} O / SIO SUB {2} = 1-40; 0.002; B) subjecting this mixture to hydrolysis and subsequent chelation a temperature of 20 (degrees) CY CLOSER TO A BOILING POINT OF ALCOHOL OR MIXTURE OF THESE SPIRITS temperature; C) subjecting the gel obtained drying and calcining. The material thus obtained is characterized by a surface area of ​​more than 500 m SUP {2} / G, a pore volume from 0.3 to 1.3 ml / g, a pore diameter less than 40 MEDIUM Y A spectrum of X-ray diffraction (XRD) of the powder does not have a crystalline structure, but possibly WITH A GENERALIZED angle values ​​no more than 2} = 5 {ZE (DEGREES) "DISPERSION". SUCH MATERIAL MAY BE USED AS AN ADEQUATE heterogeneous catalyst, as an adsorbent or vehicle PROCEDURES FOR CATALYST IN INDUSTRIAL FIELDS IN refining, petrochemicals, basic chemicals and chemical products Fine.