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handle: 10261/92606
[ES] La presente invención se refiere a un proceso de sintesis de la forma metalosilicato de materiales tipo-MWW que comprende, al menos, los siguientes pasos: i) Preparación del precursor MWW pura silice calentando una mezcla que comprende, al menos, un compuesto orgánico que actúa como agente director de estructura orgánico (ADEO), al menos una fuente de silicio y agua, entre otros compuestos que puedan ser necesarios (como por ejemplo aniones fluoruro): seguido de la recuperación del sólido cristalino resultante, ii) Tratamiento del sólido obtenido en i) con al menos una molécula orgánica capaz de expandir las láminas zeolíticas, seguida de un proceso de deslaminación y posterior eliminación de la materia orgánica. iii) Preparación del metalosilicato tipo-MWW calentando el precursor deslaminado pura sílice obtenido en el paso ii) junto con al menos una fuente de metal (M), agua, y al menos una molécula orgánica (agente director de estructura orgánico, ADEO) utilizada normalmente en la preparación típica de materiales MWW. Donde M está seleccionado entre, al menos, un elemento de los grupos 3 a 14 del periodo 4 o más de la tabla periódica, iv) Recuperación del material obtenido en iii), y posterior eliminación d ela materia orgánica recluida.
[EN] The invention relates to a process for the synthesis of the metallosilicate form of MWW-type materials, comprising at least the following steps: (i) preparing the pure silica MWW precursor, by heating a mixture containing, at least, an organic compound that acts as an organic structure-directing agent, at least one silicon source and water, among other compounds that may be necessary (such as, for example, fluoride anions) and, subsequently, recovering the resulting crystalline solid; (ii) treating the solid obtained in (i) with at least one organic molecule that can expand the zeolitic films, followed by a delamination process and the subsequent elimination of the organic matter; (iii) preparing the MWW-type metallosilicate, by heating the delaminated pure silica precursor obtained in step (ii) together with at least one source of the metal (M), water and at least one organic molecule (organic structure-directing agent) normally used in the typical preparation of MWW materials, M being selected from at least one element from groups 3 to 14 of period 4 or more of the periodic table; and (iv) recovering the material obtained in (iii) and subsequently eliminating the collected organic matter.
Consejo Superior de Investigaciones Científicas (España), Universidad Politécnica de Valencia (España)
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