Chemical formula xSiO2 yH2O. Transparent or milky white granular solid. It has an open porous structure, strong adsorption, and can adsorb a variety of substances. Dilute sulfuric acid (or hydrochloric acid) is added to the aqueous solution of water glass and allowed to stand to form a hydrous silicic acid gel and solidify. The electrolyte Na+ and SO4 2-(Cl-) ions dissolved in it are removed by washing with water, and the silica gel can be obtained after drying. If it absorbs moisture, some silica gels absorb about 40% or even 300% of moisture. It is used for gas drying, gas absorption, liquid dehydration, chromatography analysis, etc. It is also used as a catalyst. If cobalt chloride is added, it turns blue when dry and red when it absorbs water. Recyclable for repeated use.
The main component of silica gel is silicon dioxide, which is chemically stable and non-flammable. Silica gel is a kind of amorphous silicon dioxide. The dust content in the workshop should be controlled to be no more than 10 mg/m3. It is necessary to strengthen the exhaust air and wear a mask during operation.
Silica gel has a strong adsorption capacity and can dry people's skin. Therefore, work clothes should be worn during operation. If silicone gets into your eyes, rinse with plenty of water and seek medical attention as soon as possible. Because blue silica gel contains a small amount of cobalt chloride, it is potentially toxic. It should be avoided from contact with food and inhalation. In case of poisoning, seek medical treatment immediately.
Silica gel adsorbs water vapor or other organic substances in the medium during use, and its adsorption capacity decreases, and it can be reused after regeneration.
Generally speaking, silica gel can be divided into two categories: organic silica gel and inorganic silica gel according to its properties and components.
Silica gel is divided into: macroporous silica gel, coarse-pored silica gel, B-type silica gel, and fine-pored silica gel according to the size of its pore size. Due to their different pore structures, their adsorption properties have their own characteristics. Coarse-pored silica gel has a higher adsorption capacity under the condition of high relative humidity, while fine-pored silica gel has a higher adsorption capacity than coarse-pored silica gel under the condition of low relative humidity. Between the pores, the adsorption capacity is also between the coarse and fine pores.
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 opening agent, silica gel for toothpaste, etc.
Standard bag : 25kg/bag
Jumbo bag : 500kg, 600kg or 1 ton per bag Customized : Your request