搜索
imgboxbg
-
-
-
The working principle of silica gel desiccant

The working principle of silica gel desiccant

(Summary description)The silica gel desiccant is mainly obtained by the reaction of sodium silicate and sulfuric acid, and a series of post-treatment processes such as aging and acid foaming.

The working principle of silica gel desiccant

(Summary description)The silica gel desiccant is mainly obtained by the reaction of sodium silicate and sulfuric acid, and a series of post-treatment processes such as aging and acid foaming.

Information
  The silica gel desiccant is mainly obtained by the reaction of sodium silicate and sulfuric acid, and a series of post-treatment processes such as aging and acid foaming. It is insoluble in water and any solvents, non-toxic and tasteless, chemically stable, except for strong alkalis and hydrofluoric acid. The outside does not react with any substances. Both its chemical and physical properties give silica gel good moisture absorption capacity. Silica gel is used as a desiccant, and its drying principle is to rely on adsorption to remove water molecules in wet substances, that is, through the mutual attraction between the particles on the solid surface and the water molecules in various gases, liquids, etc., it is adsorbed on the surface of the solid substance. Above, most of these substances have a lot of pores and a huge surface area. Silica gel can be made by reacting soluble silicate with hydrochloric acid. The actual reaction process is very complicated. The reaction equation can generally be written as: Silicic acid has little solubility in water, but it does not precipitate immediately after formation, but silicic acid molecules Condensation occurs between the formation of silicic acid gel. After the silicic acid gel is fully washed to remove soluble salts, it is dried and dehydrated to become a porous solid substance called silica gel. Under a general humidity environment, the amount of one cube is about 500 grams, but the amount of silica gel desiccant can also be appropriately increased or decreased according to the humidity of the environment 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 the reaction with strong alkali and strong acid under certain conditions. It is a desiccant that can be used in direct contact with medicines and food. Physical desiccants that have adsorption function and can be used as desiccants, in addition to silica gel, there are activated carbon, activated alumina, etc.
 

Scan the QR code to read on your phone

Recommended news

Shandong Ruida Silica Gel Co.,Ltd. 

Tel: 

Address:

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

Copyright: © 2021 Shandong Ruida Silica Gel Co.,Ltd.       鲁ICP备14024305号