4A Molecular Sieve

4A molecular sieve refers to sodium A-type silica aluminumate,which can absorb the critical diameter of molecules below 4A.It can be used to adsorb water,carbon dioxide,alcohols,olefins,etc. Our 4A molecular sieve have uniform hole channel,large water absorption, faster adsorption rate and lower regenerated temperature.

Note: The above is typical data. We can also produce per customers' request.

• Deep drying of air,natural gas,alkane,refrigerant and other gases and liquids
• Preparation and purification of argon
• Static drying of pharmaceutical packaging,electronic componentsand perishable substances
• Used as dehydrating agent in paints,fuels and coatings

Packaging: Steel drum / paper drum / aluminum foil bag or according to customer's request.
Storage: Avoid damping and any adsorption of water or organic substance before use. Otherwise it must be regenerated.

1.How is 4A molecular sieve been regenerated?
The adsorption capacity can be regenerated through thermal regeneration:
Conventional method: Introduce dry air or nitrogen at 250–350°C and heat for 4–6 hours;
Vacuum regeneration: Combining with vacuum (less than 10 kPa) at 150–250°C yields better results;
After regeneration, it needs to be quickly cooled and sealed for storage to prevent re-hydration.
Note: If contaminated by oil stains or organic solvents, it may cause permanent deactivation and be difficult to fully regenerate.

2.Can 4A molecular sieves adsorb carbon dioxide?
Sure. The dynamic diameter of CO₂ is approximately 3.3 Å, which is smaller than the pore diameter of 4 Å (4.2 Å). Therefore, it can be effectively adsorbed. This property makes it commonly used for:
Carbon dioxide removal from natural gas;
Removing CO₂ impurities in the argon production process;
Air purification in enclosed spaces (such as submarines, spacecraft.

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