Silica gel is a kind of highly active adsorption material. The main component is silicon dioxide (SiO2), which is an amorphous substance and its chemical formula is mSiO2. nH2O. It is usually made by reacting sodium silicate with sulfuric acid and after a series of post-treatment processes such as aging and acid bubbles.

The physical structure of silica gel is rich in micropores and high specific surface area. Its surface is a silicon hydroxyl structure, so it has a strong adsorption effect on water vapor or other polar substances and selective adsorption separation ability. During adsorption, drying, It has a wide range of applications in the fields of material separation, purification, and high-purity preparation. In the field of chemical engineering, silica gel can be used as a catalyst or catalyst carrier.

Silica gel has the following advantages in application due to its chemical composition and physical structure characteristics:

(1) The chemical properties are stable, except for hydrofluoric acid (HF) and strong alkali, it is insoluble in any other solvents and solutions;

(2) Good thermal stability, A-type fine pore silica gel can be used at a temperature within 300 ℃, while other types of silica gel can be used for a long time under high temperature conditions of 500-600 ℃

(3) Silicone has a rigid skeleton structure and has good wear resistance and compressive strength.

 Each variety of silicone products has its own characteristics. This is because during the manufacturing process of silica gel, different types of pore structures can be obtained by controlling the corresponding process conditions and adapted to different application fields