Pingxiang City Zhongying Molecular Sieve type 3A is an alkali metal alumino-silicate; it is the potassium form of the type A crystal structure. Type 3A has an effective pore opening of about 3 angstroms (0.3nm). This is large enough to allow in moisture, but excludes molecules such as unsaturated hydrocarbons which can potentially form polymers; and this maximises lifetime when dehydrating such molecules.

 

 Typical Chemical Formula
0.45 K2O . 0.55 Na2O . Al2O3 . 2 SiO2 . 4.5H2O
 SiO2 : Al2O3 ≈2

 

 Technical Parameter of Zhongying Molecular sieves 3A

Item	Unit	Technical data
Shape		Pellet		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	≥98	≥96	≥96
Bulk density	g/ml	≥0.64	≥0.64	≥0.68	≥0.68
Wear ratio	%	≤0.20	≤0.25	≤0.10	≤0.10
Crushing strength	N	≥45/cm	≥60/cm	≥30/piece	≥70/piece
Static water adsorption	%	≥20	≥20	≥20	≥20
Ethylene adsorption	%	≤3.0	≤3.0	≤3.0	≤3.0
Water content, as shipped	%	≤1.5	≤1.5	≤1.5	≤1.5

 

Typical Application of Molecular sieves 3A

 Drying of unsaturated hydrocarbons (e.g. ethylene, propylene, butadien)
 Cracked Gas Drying
 Drying of natural gas, if COS minimization is essential, or a minimum co-adsorption of hydrocarbons is required.
 Drying of highly polar compounds, such as methanol and ethanol
 Drying of liquid alcohol
 Static, (non-regenerative) dehydration of insulating glass units, whether air filled or gas-filled.
 Drying of refrigerants