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Material de estructura tipo zeolita de poros ultragrandes con un red constituida por óxidos de silicio y titanio: su síntesis y utilización para la oxidación selectiva de productos orgánicos

Authors: Corma, Avelino; Navarro, María Teresa; Pérez-Pariente, Joaquín;

Material de estructura tipo zeolita de poros ultragrandes con un red constituida por óxidos de silicio y titanio: su síntesis y utilización para la oxidación selectiva de productos orgánicos

Abstract

Material de estructura tipo zeolita de poros ultragrandes con una red constituida por óxidos de silicio y titanio: su síntesis y utilización para la oxidación selectiva de productos orgánicos. Se trata de un material constituido por silicotitanatos de estructura cristalina semejante a las zeolitas tipo MCM-41 caracterizado por contener en su red átomos de titanio y canales en su estructura porosa cuyos dimensiones medias superan los 10 angstron, lo que le permite catalizar reacciones en las que intervienen moléculas orgánicas voluminosas tales como oxidar olefinas a epóxidos y glicoles, alcoholes a cetonas, tioéteres a sulfóxidos y sulfonas, y fenol a catecol e hidroquinona y si se introduce A1 en la estructura, es posible preparar catalizadores bifuncionales oxidante- acido/base. Para conseguir este producto se parte de una disolución acuosa que contiene el ión NR1R2R3R4+ y otra que contiene hidróxido de tetrametil amonio y una fuente de sílice (p.e. aerosil (c)). Tras la homogeneización se añade más sílice, y la fuente de Ti [p.e. Ti(C2OH5)4]. El gel resultante se calienta en un autoclave a una temperatura entre 80 y 200ºC. El gel obtenido se activa por calcinación entre 350 y 800ºC. Se emplea para la oxidación catalítica.

Referencia OEPM: P9301327.-- Fecha de solicitud: 15/06/1993.-- Titulares: Universidad Politécnica de Valencia (UPV), Consejo Superior de Investigaciones Científicas (CSIC).

Peer reviewed

Keywords

Zeolitas, Oxidación selectiva, Canales, Catalizadores, Diámetro de poro, Oxidación catalítica, Zeotipos, Síntesis

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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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