Molecular Sieve
4A Molecular Sieve is a highly effective synthetic zeolite adsorbent designed for dehydration, purification, and separation processes in industries such as petrochemicals, natural gas, refrigeration, and pharmaceuticals. With a uniform pore size of 4 angstroms (0.4 nm), it selectively adsorbs water and small molecules while excluding larger compounds, ensuring optimal performance in drying and purification applications. Its high adsorption capacity, rapid kinetics, and thermal stability make it ideal for both industrial and laboratory use.
4A Molecular Sieve
The 3A molecular sieve is a synthetic zeolite with a uniform pore structure (3Å diameter), enabling selective adsorption based on molecular size and polarity.
Key Mechanisms:
- Size-Selective Adsorption: The 3Å pores allow only molecules smaller than 3Å (e.g., H₂O, 2.6Å) to enter, while excluding larger molecules (e.g., NH₃, CO₂, hydrocarbons).
- Ion-Exchange Modification: Derived from 4A molecular sieve (Na⁺ form), 3A is produced by replacing Na⁺ with larger K⁺ ions, reducing the effective pore size from 4Å to 3Å.
- High Affinity for Water: The negatively charged aluminosilicate framework and K⁺ cations create strong electrostatic interactions with polar H₂O molecules, ensuring efficient adsorption.
3A Molecular Sieve
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