| 摘要 |
PCT No. PCT/FR97/00998 Sec. 371 Date Jun. 8, 1998 Sec. 102(e) Date Jun. 8, 1998 PCT Filed Jun. 5, 1997 PCT Pub. No. WO97/46487 PCT Pub. Date Dec. 11, 1997The invention provides an activated silica enriched mazzite having a chemical formula in the anhydrous state, expressed in molar ratios of: a M2/nO; Al2O3; b SiO2; with a variation from 0 to 0.5, M being an alkaline cation of valency n and b being greater than 7, and which 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 0.09 ml/g. The activated mazzites are useful in the conversion of hydrocarbons, in particular, the isomerization of C4 to C8 paraffin, and as molecular sieves in processes for the separation of hydrocarbons.
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