4A Molecular sieve is made by aluminosilicate. Because of its special crystal structure and 4A length mesh, it can totally adsorb the substance  whose diameter is smaller  than 4A. It is mainly used as desiccant to gas、industrial、liquid、medicine、electronic component and verderblich goods.

Chemical Formula：Na₂O* Al₂O₃*2SiO₂*9/2H₂O

Si/Al ratio：SiO₂/ Al₂O₃≈2

I、Technical index:

Item	imit	Type & Measure
		Bead (8×12 mesh 4×8 mesh)				Pellet(1/16” 1/8”)
Diameter	mm	1.6-2.5	3-5	5-8	1.6		3.2
Size Ratio	≥%	98	98	98	92		92
Bulk Density	≥g/ml	0.70	0.68	0.66	0.68		0.66
Abrasion	≤%wt	0.1	0.1	0.1	0.2		0.2
Strength	≥N	40	80	140	40		85
Methanol Adsorption Capacity	≥mg/g	140	140	140	140		140
Water Adsorption Capacity	≥mg/g	215	215	215	215		215
Water Content Of Package	≤%wt	1.0	1.0	1.0	1.0		1.0

Ⅱ、Main Applications:  

         Deeply dry air、gas、hydrocarbon、alkene and refrigerant.

         Refine Argon, separate CH₃、C₂H₅、C₃H₇.

         Equilibrium dry electronic component and verderblich goods.

         Dehydration of paint、dye and P-poly.