Preparation method of silica gel carrier with large aperture

The invention discloses a preparation method of a silica gel carrier with large aperture. Silicate and organic acid anhydride are used as reaction raw materials; the organic acid anhydride is a small molecular organic liquid anhydride formed by intermolecular dehydration of organic acid with one carboxyl group, and preferably liquid organic anhydride with the number of carbon of C2-C6; and the small molecular organic liquid anhydride is hydrolyzed to obtain corresponding organic acid with water solubility. Hydrolysis of the organic acid anhydride not only provides electrolyte for the reaction, water absorption is the hydrolysis process can accelerate intermolecular dehydration of the molecules of the original silicate, so as to urge micelle growth, expand the aperture of silica gel carrier; and the silica gel with large aperture fir polyolefin carrier can be obtained directly. The preparation method of the invention is simple and convenient for popularization.