Preparation and Application Situation of Silica Gel

Silica gel was insoluble in water and any solvent,non-toxic and odorless,chemical stability,except strong alkali and hydrofluoric acid,and it can't react with any material.According to its aperture size's,it was divided into big pore silica gel,thick pore silica gel,the type B silica gel and the fine pore silica gel.Because the pore structure was different,so they had different features of adsorption performance.Silica gel was a highly active adsorption materials,usually prepared by the sodium silicate and sulfuric acid as raw material.Various silica gel production technology was introduced,and the present situation of the application of the silica gel was discussed.