Inventors: Crowther N, Bonnevoit L, Badiei A
Patent Title: Formation of hydrophilic sites in partially silylated micelle templated silica
Publication date: 2002
Publication number: WO0216267

Abstract: The invention relates to a method of preparing a partially silylated silica having at a surface thereof hydrophilic sites defined by non-silylated hydroxyl groups. The method of the invention comprises the steps of (a) providing a micelle templated silica having at a surface thereof surfactant-protected hydroxyl groups and unprotected hydroxyl groups; (b) treating the micelle templated silica with a base-generating silylating agent to silylate the unprotected hydroxyl groups and thereby obtain a partially silylated micelle templated silica; and (c) treating the partially silylated micelle templated silica with an acid to displace the surfactant, thereby obtaining a partially silylated silica having at the surface thereof hydrophilic sites defined by non-silylated hydroxyl groups. Such a partially silylated silica having hydrophilic sites is useful as a catalyst support and for ion exchange in chromatography.
URL: http://v3.espacenet.com/textdoc?DB=EPODOC&IDX=WO0216267&F=0