icon HOME / NEWS

Inorganic silica gel

🕙 2023-08-16 👆 622

Classification of inorganic silica gel

Silica gel according to the size of its pore size is divided into: large pore silica gel, coarse pore silica gel, B type silica gel, fine pore silica gel. Because of the different pore structures, their adsorption properties have their own characteristics. Coarse porous silica gel has a higher adsorption capacity in the case of high relative humidity, and the adsorption capacity of fine porous silica gel is higher than that of coarse porous silica gel in the case of low relative humidity, and the adsorption capacity of B-type silica gel is also between thick and fine pores due to the pore structure.

According to its use, inorganic silica gel can also be divided into beer silica gel, pressure swing adsorption silica gel, medical silica gel, color-changing silica gel, silica gel desiccant, silica gel opener, toothpaste silica gel and so on.

Microporous silica gel

Porous silica gel is colorless or slightly yellow transparent vitreous body, its basic quality parameters are as follows: average hole distance 2. 0-3. 0nm, specific surface 650-800㎡ /g, hole capacity 0. It's 35-0. 4ml/g, specific heat 0. 92KJ/kg. ℃, thermal conductivity 0. 63KJ/m. hr. ° C.

Application: Suitable for drying, moisture-proof and rust-proof. It can prevent instruments, meters, weapons and ammunition, electrical equipment, medicines, food, textiles and other various packaging items from getting damp, and can also be used as catalyst carriers and dehydrating organic compounds. Because of its high packing density and obvious hygroscopic effect under low humidity, it can be used as an air purifier to control air humidity. In the sea also has a wide range of applications, because the goods in the transport process often due to humidity and deterioration, with this product can effectively moisture-proof, so that the quality of the goods is guaranteed. Porous silica gel is also commonly used for dehumidification between two layers of parallel sealed window panels, which can maintain the clarity of the two layers of glass.

B silica gel

Properties: Type B silica gel is milky white transparent or translucent spherical or massive particles. The structure of B-type rubber hole is between coarse silica gel and fine silica gel. Basic quality parameter: hole volume is 0. 60-0. 85ml/g with an average aperture of 4. 5-7. 0nm, the specific surface is 450-650m2 /g.

Uses: Mainly used as air humidity regulator, catalyst and carrier, pet bedding, and used as raw material for fine chemical products such as chromatographic silica gel.

Coarse silica gel

Coarse silica gel, also known as C-type silica gel, is a kind of silica gel, which is a highly active adsorption material, belonging to the amorphous substance, and its chemical formula is mSiO2·nH2O. Insoluble in water and any solvent, non-toxic and tasteless, chemically stable, in addition to strong alkali, hydrofluoric acid does not react with any substance. The chemical composition and physical structure of coarse silica gel determines that it has the characteristics that many other similar materials are difficult to replace: high adsorption performance, good thermal stability, stable chemical properties, and high mechanical strength.

The appearance of coarse silica gel is white, and there are three types of products: block, ball and microsphere. Coarse spherical silica gel is mainly used for gas purification agent, desiccant and acid removal agent of insulating oil, etc. Bulk silica gel with coarse pore is mainly used as catalyst carrier, desiccant, gas and liquid purifier.