Method for separating molecules in gaseous phase by adsorption with solid agglomerated inorganic adsorbents having a narrow and calibrated distribution of mesopores

摘要

An inorganic solid of narrowly defined pore diameter with the capacity for adsorbing more than 7.5% (preferably more than 10%) weight of toluene at a relative pressure of 0.5 at 25 degrees C comprises 50-90 parts weight of an inorganic solid micelle templated silica (MTS) and 5-50 parts weight of an inert binder. An inorganic solid with the capacity for adsorbing more than 7.5% (preferably more than 10%) weight of toluene at a relative pressure of 0.5 at 25 degrees C is claimed. It has a mesoporous volume greater or equal to 0.09 cm<3>/g and at least 90% of the total porous volume has a diameter greater than 20 Angstrom . At least 90% of the porosity is distributed at plus or minus 5 Angstrom around the mean diameter. The mean particle size is 1-10 mm and the material comprises : (1) 50 to 95 parts weight of an inorganic solid MTS capable of adsorbing more than 15% of toluene at a relative pressure of 0.5 at 25 degrees C with a mesoporous volume greater or equal to 0.18 cm<3>/g of which at least 90% has a diameter greater than 20 Angstrom and at least 90% of the porosity is distributed at plus or minus 5 Angstrom around the mean diameter ; (2) 50 to 5 parts wt. of an inert binder. Independent claims are also included for the preparation of the adsorbent and the processes of separation using the material.