How to classify silica gel in the market and what are the differences in its use?

Silica gel on the market can be divided into three types: A-type silica gel, B-type silica gel and C-type silica gel. Today, Weiqi will introduce these types of silica gel to you.

1. Type A silica gel

[Characteristics] It has small pore size and large specific surface area, and belongs to dry, low humidity and high adsorption, that is, the adsorption effect is good when the relative humidity is 20-50%. Its advantage is fast adsorption when the relative humidity is low, but its disadvantage is low total adsorption capacity.

2. Type B silica gel

[Characteristics] Type B silica gel is a milky transparent or translucent spherical or massive particle, whose structure is between coarse and fine pores, with an average pore size of 40-70A, a specific surface area of 400-550m2/g and a pore volume of 0.6-0.75ml/g. 。

[Main uses] Type B silica gel is an excellent adsorption material, which can be used as liquid adsorbent, adsorption desiccant, catalyst carrier, bedding for keeping domestic pets and making fragrant silica gel. The characteristic of is based on the relationship between type A and type C.

3. C-type silica gel

[Characteristics] C-type silica gel, also known as coarse pore silica gel, is ivory translucent ground glass, divided into spherical and blocky shapes, with an average pore size of 8.0-10.0nm, a pore volume of 0.80-1.0ml/ g, a specific surface area of 300-400m2/q, a specific heat of 0.92KJ/ kq .℃ and a thermal conductivity of 0.167 kJ/m.

[Main uses] The main raw materials of silica gel cat litter: after further drying and screening, it can be used as desiccant, adsorbent and catalyst carrier; it can also be used as moisture-proof, rust-proof, gas dehydration and purification and catalyst carrier, and can also absorb harmful elements in water; Removing organic acids and polymers from insulating oil; It is also the basic raw material for further processing fine silica gel products. It has large pore size and small specific surface area, and is characterized by high humidity and high adsorption, that is, when the relative humidity is greater than 50%, the adsorption is good; The advantage is that the total adsorption capacity is large, but the disadvantage is that the adsorption is slower than that of type A silica gel.