Process for preparing macroporous silica gels

摘要

The invention relates to the preparation of macroporous silica gels which are used as adsorbents, catalyst supports or enzyme supports and as compact phases for chromatography. A process is described for preparing macroporous silica gels based on polyalkoxysiloxanes, or alkoxy silanes, by ammonolysis in concentrated ammoniacal aqueous solutions, in which silica gels having pore sizes between 15 and 400 nm are obtained.