1.Product Description
Molecular Sieve 4A is an alkali alumino silicate; it is the sodium form of the Type A crystal structure. 4A molecular sieve has an effective pore o p ening of about 4 angstroms (0.4nm). 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.
2.Typical Chemical Formula
Na2O Al2O3 2.0 SiO2 4.5 H2O
3.Technical Data
Item
Unit
Technical data
Shape
Bar
Sphere
Diameter
mm
1.5-1.7
3.0-3.3
1.7-2.5
3.0-5.0
Size ratio up to grade
%
≥98
≥96
Bulk density
g/ml
≥0.60
Wear ratio
≤0.20
≤0.25
Crushing strength
N
≥30/cm
≥45/cm
≥60/p
≥70/p
Static water adsorption
≥20.5
Water content, as shipped
≤1.5
4.Typical Application
Drying and removing of CO2 from natural gas, LPG, air, inert and athmospheric gases, etc. Removal of hydrocarbons, ammonia and methanol from gas streams. (ammonia syn gas treating) Special types are used in the air break units of buses, trucks and locomotives. Packed in small bags, it may be used simply as a packaging desiccant.
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