4A Molecular Sieve:
Has a pore size of 4A or 4 angstrom. Any molecule larger than 4A will not be able to be adsorbed. 4 Angstroms are the sodium forms of the Type A crystal structure. The sequence rate of adsorption is argon, krypton, xenon, ammonia, carbon monoxide, C2H4, C2H2, CH3OH, C2H5OH, CH3CN2, CS2, CH3CL, CH3Br, and carbon dioxide.
The advantages of our high quality 4A mole sieve are consistent adsorption speed, and higher contamination resistance, stronger crushing increasing cyclic times that provide an extended product life. 4A Molecular Sieve is primarily for removing moisture from liquefied and gaseous materials.
Molecular Sieve type 4A is an alkali alumino silicate; it is the sodium form of the Type A crystal structure. 4A molecular sieve has an effective pore opening of about 4 angstroms (0.4nm). Type 4A molecular sieve will adsorb most molecules with a kinetic diameter of less than 4 angstroms and exclude those larger. Such adsorbable molecules include simple gas molecules such as oxygen, nitrogen, carbon dioxyde and straight chain hydrocarbons. Branched chain hydrocarbons and aromatics are excluded.
It has become one of the most reliable desiccants for a variety of applications including:
Moisture removal in PU Plastic or Paint
Natural Gas Drying
Drying Cracked Gas
Static drying of insulating glass units, whether air filled or gas-filled.
Dehydration of highly polar compounds, such as methanol and ethanol.
Dehydration of unsaturated hydrocarbons (e.g. ethylene, propylene, butadiene).
Regeneration: 4A Molecular Sieve regenerated and reused. To regenerate the sieve you need to remove the adsorbed moisture and other materials. To regenerate 4A Molecular Sieve heat to a temperature of 250ƒ to 450ƒ.
Typical Formula: Na12[(AlO2)12(SiO2)12] • nH2O