XINTAO 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). Chemxin 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.
Formula：Na2O . Al2O3 . 2SiO2 . 4.5 H2O (SiO2 : Al2O3 ≈2)
Molecular Sieve 4A
Nominal pore diameter
Bulk density (g/ml)
Crushing strength (N/PC)
Static H2O adsorption
Static methanol adsorption
Water content (%)
Wear ratio (%)
▣ Removing of moisture from natural gas, LPG, air, inert and atmospheric gases, etc.
▣ Used for as desiccant used in air compressor, air dryer.
▣ Special types are used in the air break units of buses, trucks and locomotives.
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