Analysis of the development trend of molecular sieves in the desiccant industry

Commonly used desiccants can be divided into three categories: one is acid desiccant: concentrated sulfuric acid, phosphorus pentoxide, can be dry neutral or acid gas; the second is alkaline desiccant: lime, calcium oxide, solid sodium hydroxide , sodium metal, its role is dry neutral or alkaline gas; three types of neutral desiccant: calcium chloride, activated alumina balls, molecular sieve desiccant, water-resistant silica gel, etc., dry neutral, alkaline or acidic gas.
 
Neutral desiccant is also the most commonly used desiccant, the most widely used. Neutral desiccant molecular sieve has the highest utilization rate in industrial production. It is favored and pursued by the production enterprises.





Desiccant is also called adsorbent. It is used for moisture, mildew and dryness. It is a dehydrating agent that absorbs moisture from the atmosphere. Its drying principle is to physically adsorb water molecules or chemically absorb water molecules. Its chemical structure has become another material. We often see desiccants in our daily life.




We will see a desiccant bag in the puffed food bag, which is a desiccant to absorb moisture from the air and prevent the food from getting wet. The dry bag can also be seen in the shoe box just bought. Its function is The same. The air separation device also has a molecular sieve desiccant. The role of the molecular sieve desiccant is to absorb moisture in the air and reduce the dew point temperature.


Zeolite molecular sieve can adsorb water, methanol, ethanol, hydrogen sulfide, sulfur dioxide, carbon dioxide, ethylene, propylene, etc. The selective adsorption of water is higher than any other molecule. In addition, molecular sieves are also used in air separation plants, petrochemicals, natural gas purification. And other industries.