| 摘要 |
<p>The invention features an activated silica enriched mazzite of chemical formula, in anhydrous state, expressed in molar ratios as: a M2/nO; Al2O3; b SiO2, with a varying from 0 to 0.5, M being an alkaline cation of valency n and b being greater than 7, characterised in that it has an acid strength corresponding to an amount of heat measured by ammonia absorption microcalorimetry, greater than 190 KJ/mol, and a pore volume, measured by cyclohexane adsorption, greater than 0.09ml/g.</p> |
