NEWS

The working principle of silica gel desiccant

Time:

2022/12/15

The silica gel desiccant is mainly obtained by reacting with sodium silicate and sulfuric acid, and through a series of post-treatment processes such as aging and acid bubble, etc. It is insoluble in water and any solvent, tasteless, chemically stable, and does not react with any substance except strong alkali and hydrofluoric acid. Both its chemical and physical properties give silica gel good moisture absorption ability. As a desiccant, the drying principle of silica gel relies on adsorption to remove the water molecules in moist substances, that is, through the mutual attraction between the plasmas on the solid surface and the water molecules in various gases and liquids, etc. and adsorbs them on the surface of solid substances, most of these substances have many pores and have a huge surface

　　The silica gel desiccant is mainly obtained by reacting with sodium silicate and sulfuric acid, and through a series of post-treatment processes such as aging and acid bubble, etc. It is insoluble in water and any solvent, tasteless, chemically stable, and does not react with any substance except strong alkali and hydrofluoric acid. Both its chemical and physical properties give silica gel good moisture absorption ability. As a desiccant, the drying principle of silica gel relies on adsorption to remove water molecules in moist substances, i.e., it is adsorbed on the surface of solid substances through the mutual attraction between the masses on the surface of the solid and the water molecules in various gases and liquids, etc. Most of these substances have a lot of pores and a huge surface area. Silica gel can be made by reacting soluble silicates with hydrochloric acid. The actual process of the reaction is complex, and the reaction equation can be generally written as follows: the solubility of silicicic acid in water is not large, but it does not precipitate immediately after generation, but the silicic acid molecules condense with each other to form a silicic acid gel. After the silicic acid gel is fully washed to remove the soluble salts, it is dried and dehydrated to become a porous solid substance called silica gel. Under the environment of general humidity, the dosage of a cubic meter is about 500 grams, but the dosage of silica gel desiccant can be increased or decreased appropriately according to the high or low humidity of the environment, so as to achieve a more reasonable and correct moisture absorption effect.
　　Silica gel itself is a neutral substance and will not react with any other substances except for reacting with strong alkali and strong acid under certain conditions. It is a kind of desiccant that can be used in direct contact with medicine and food. The physical desiccant with adsorption effect can be used as desiccant, except for silica gel, there are also activated carbon, activated alumina and so on.

keywords

Prev：

无

硅胶干燥剂遇水会不会爆炸

：Next

Prev

None

Next

硅胶干燥剂遇水会不会爆炸

RUIDA
RUIDA

Mobile website

Contact us

Contact: Manager Sun
Tel：+86-18769968669
Tel：+86-539-7711688
E-mail：2283501705@qq.com

Address:

Junan County,  Linyi City, Shandong Province Economic Development Zone  Chinese

Copyright © 2022 Shandong Ruida Silica Gel Co.，Ltd. All Rights Reserved

SEO

Powered by  www.300.cn

Full Site Search

Submit
%{tishi_zhanwei}%