Silica gel desiccant
Brand rainbon
Product origin shandong
Name: Silicone
Alias: Silica gel oxide or silicic acid gel
Molecular formula: xSiO2-yH2O
Molecular weight：60.08
CAS Registry Number：CAS# 112926-00-8
EINECS Registry Number: 231-545-4
Explanation of words
Chemical formula xSiO2-yH2O. transparent or milky white granular solid. It has open porous structure and strong adsorption ability, and can adsorb many kinds of substances. When dilute sulfuric acid (or hydrochloric acid) is added to the aqueous solution of water glass and left to stand, it becomes a water-silicate gel and solidifies. The electrolyte Na+ and SO4 2-(Cl-) ions dissolved in it are removed by water washing, and silica gel is obtained after drying. If absorbing water, some silica gel moisture absorption is about 40%, even 300%. It is used for gas drying, gas absorption, liquid dehydration, color layer analysis, etc. It is also used as a catalyst. If cobalt chloride is added, it will be blue when dried and red after absorbing water. It can be regenerated and used repeatedly.
Name: Silicone
Alias: Silica gel oxide or silicic acid gel
Molecular formula: xSiO2-yH2O
Molecular weight：60.08
CAS Registry Number：CAS# 112926-00-8
EINECS Registry Number: 231-545-4
Explanation of words
Dry silicate gels are dehydrated and dried silica gels, generally referred to as silica gel, with a rich porous structure and a large specific surface.
The chemical composition of silica gel is mSiO2-nH2O, and its basic structural unit is silica-oxygen tetrahedra. The silica-oxygen tetrahedra are connected in different ways, and if the connections are regular, SiO2 crystals can be obtained, while the irregular stacking resembles glassy SiO2 particles, which form the backbone of silica gel. When it is a hydrogel, the pores in the stack are filled with water, while when it is a dry gel, it is hollow. As shown in the schematic diagram of the structure of silica-oxygen tetrahedra connected into crystalline SiO2 and glassy SiO2. The structure of silica gel is similar to the structure of glassy SiO2
There is no clear classification of silica gel, we are routinely divided into non-discolored silica gel and discolored silica gel according to the characteristics of moisture absorption, and discolored silica gel is divided into blue silica gel and orange silica gel
| blue silica gel
| Non-discolored silicone (colorless silicone)
| orange silica gel
|
Silica gel desiccant is a kind of highly active adsorbent material, which is usually made by reacting with sodium silicate and sulfuric acid and through a series of post-treatment processes such as aging and acid bubble. Silica gel is an amorphous material with the chemical formula of mSiO2.nH2O, which is insoluble in water and any solvent, non-toxic and tasteless, chemically stable, and does not react with any substance except strong alkali and hydrofluoric acid. The chemical composition and physical structure of silica gel determines that it has many characteristics that are difficult to be replaced by other similar materials. The silica gel desiccant has high adsorption performance, good thermal stability, stable chemical properties, high mechanical strength and so on.
We can customize moisture-permeable packaging in various material shapes .It is widely used in the storage and transportation of instruments, meters, equipment and instruments, leather, bags, shoes, textiles, food and medicine, etc. It controls the relative humidity of the environment to reduce and slow down the moisture, mold and rust of the items.
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