3A, 4A, 5A, and 13X molecular sieves are common types of molecular sieves, which differ in structure and use. The following are their main differences and their respective industry applications:
3A molecular sieve
Aperture: about 3 Å (angstroms)
Main component: potassium type A (K-A type) molecular sieve
Use:
Dehydration: suitable for dehydration of small molecular polar substances such as methanol, ethanol, propanol, etc.
Drying: can be used to dry liquids and gases.
Storage: used to store deliquescent substances to prevent moisture absorption.
Industry applications:
Petrochemical
Pharmaceutical
Electronic manufacturing
4A molecular sieve
Aperture: about 4 Å
Main component: sodium type A (Na-A type) molecular sieve
Use:
Adsorption: suitable for adsorption of water, carbon dioxide and certain organic matter.
Dehydration: widely used in the dehydration process of industrial gases and liquids.
Catalyst carrier: used as a catalyst carrier in certain chemical reactions.
Industry applications:
Refrigerant drying
Natural gas drying
Industrial gas purification
5A molecular sieve
Pore size: about 5 Å
Main component: calcium type A type (Ca-A type) molecular sieve
Application:
Adsorption: suitable for adsorption of water, carbon dioxide, ammonia and C3-C4 hydrocarbons.
Gas separation: used for separation of normal alkanes and isoalkanes.
Gas drying: used for drying natural gas, hydrogen and other gases.
Industry applications:
Petroleum refining
Air separation
Chemical production
13X molecular sieve
Pore size: about 10 Å
Main component: sodium type X type (Na-X type) molecular sieve
Application:
Adsorption: suitable for adsorption of water, carbon dioxide, sulfide and larger molecular organic matter.
Gas purification: used for purification and desulfurization of industrial gases.
Catalyst carrier: a carrier used for certain catalytic reactions.
Industry applications:
Air separation
Industrial gas purification
Pharmaceutical and food industries
Each molecular sieve is suitable for different application scenarios and industry needs due to its different pore size and composition. Choosing the right type of molecular sieve can greatly improve production efficiency and product quality.
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