3A Molecular Sieve
4*8 mesh drying adsorbent molecular sieve 3a for removing moisture . Chemxin Molecular Sieve type 3A is an alkali metal alumina-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).
3A Molecular Sieve
Chemxin Molecular Sieve type 3A is an alkali metal alumina-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 maximizes lifetime when dehydrating such molecules.
Nominal pore diameter
1.7-2.5 (8*12 mesh)
3.0-5.0 (4*8 mesh)
1.6 (1/16 inch)
3.2 (1/8 inch)
Size ratio up to grade (%)
Bulk density (g/ml)
Wear ratio (%)
Crushing strength (N)
Static H2O adsorption (%)
Dynamic capacity (%)
Ethylene adsorption (‰)
Water content (%)
Typical Chemical Formula
0.4K2O . 0.6Na2O . Al2O3 . 2SiO2 . 4.5 H2O (SiO2 : Al2O3 ≈2)
a) Drying of unsaturated hydrocarbons (e.g. ethylene, propylene, butadien)
c) Drying of natural gas, if COS minimization is essential, or a minimum
co-adsorption of hydrocarbons is required.
Chemxin 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 200-230°C is required. A properly regenerated molecular sieve can give moisture dew points below -100°C.
The outlet concentrations on a pressure swing process will depend on the gas present, and on the conditions of the process.
3A - Zeolite 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.
To avoid damp and pre-adsorption of organic before running, or must to be reactivated.
Package & Shipment.
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