Molecular Sieve 3A

Pingxiang Global 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.
FORMULA
0.45 K2O. 0.55 Na2O. Al2O3.2 SiO2.4.5H2O
SiO2: Al2O3 =2
TYPICAL APPLICATION
1)Drying of unsaturated hydrocarbons (e. G. Ethylene, propylene, butadien)
2)Cracked Gas Drying
3)Drying of natural gas, if COS minimization is essential, or a minimum co-adsorption of hydrocarbons is required.
4)Drying of highly polar compounds, such as methanol and ethanol
5)Drying of liquid alcohol
6)Static, (non-regenerative) dehydration of insulating glass units, whether air filled or gas-filled.
7)Drying of refrigerants
REGENERATION
Global molecular sieve Type 3A can be regenerated by either heating in the case of thermal swing processes; Or by lowering the pressure in the case of pressure swing processes.
To remove moisture from a 3A molecular sieve, a temperature of 200-230C is required. A properly regenerated molecular sieve can give moisture dew points below -100C.
The outlet concentrations on a pressure swing process will depend on the gas present, and on the conditions of the process.
SIZE
3A - Zeolites are available in beads of 1-2 mm, (10x18 mesh) 2-3 mm, (8x12 mesh), 2.5-5 mm, (4x8 mesh) and as powder, and in pellet 1.6mm, 3.2mm.
ATTENTION
To avoid damp and pre-adsorption of organic before running, or must to be reactivated.&
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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

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