C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
C07F 7/10 (2006.01) C01B 33/12 (2006.01) C01B 37/02 (2006.01) C07F 7/18 (2006.01) C09C 1/30 (2006.01)
Patent
CA 2317056
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.
Badiei Alireza
Bonneviot Laurent
Crowther Nicolas
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Universite Laval
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