SOLVENT-FREE MECHANOCHEMICAL ACTIVATION IN ZEOLITE SYNTHESIS

摘要

The present invention relates to a process for preparing a zeolitic material comprising YO₂ and X₂O₃ in its framework structure, wherein Y stands for a tetravalent element and X stands for a trivalent element, wherein said process comprises: (i) preparing a mixture comprising one or more sources of YO₂, one or more sources of X₂O₃, and H₂O; (ii) grinding and/or mixing the mixture prepared in (i), wherein the energy intake of the mixture during the grinding and/or mixing procedure is in the range of from 0.3 to 200 kJ/kg of the mixture; (iii) adding water, preferably distilled water, to the ground mixture obtained in (ii) and preferably homogenizing the resulting mixture; and (iv)crystallizing a zeolitic material comprising YO₂ and X₂O₃ in its framework structure from the mixture obtained in (iii), wherein the mixture is heated to a temperature in the range of from 80 to 300°C; wherein the mixture prepared in (i) and ground in (ii) contains from 5 to 300 wt.-% of H₂O based on 100 wt.-% of the one or more sources of YO₂, calculated as YO₂. Furthermore, the invention relates to a zeolitic material comprising YO₂ and X₂O₃ in its framework structure as obtainable and/or obtained according to the inventive process as well as to the use of said material.