3A Molecular Sieve
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.
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Model |
3A |
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Color |
Light gray |
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Nominal pore diameter |
3 angstroms |
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Shape |
Sphere |
Pellet |
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Diameter (mm) |
1.7-2.5 |
3.0-5.0 |
1.6 |
3.2 |
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Size ratio up to grade (%) |
≥98 |
≥98 |
≥96 |
≥96 |
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Bulk density (g/ml) |
≥0.72 |
≥0.70 |
≥0.66 |
≥0.66 |
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Wear ratio (%) |
≤0.20 |
≤0.20 |
≤0.2 |
≤0.2 |
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Crushing strength (N) |
≥55/piece |
≥85/piece |
≥30/piece |
≥40/piece |
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Static H2O adsorption (%) |
≥21 |
≥21 |
≥21 |
≥21 |
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Ethylene adsorption (‰) |
≤3.0 |
≤3.0 |
≤3.0 |
≤3.0 |
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Water content (%) |
≤1.5 |
≤1.5 |
≤1.5 |
≤1.5 |
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Typical chemical formula |
0.4K2O . 0.6Na2O . Al2O3. 2SiO2. 4.5 H2O SiO2: Al2O3≈2 |
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Typical application |
a) Drying of unsaturated hydrocarbons (e.g. ethylene, propylene, butadien) |
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Package |
Carton box; Carton drum; Steel drum |
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MOQ |
1 Metric Ton |
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Payment terms |
T/T; L/C; PayPal; West Union |
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Warranty |
a) By National Standard GBT 10504-2008 |
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b) Offer lifetime consultation on problems occurred |
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Container |
20GP |
40GP |
Sample order |
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Quantity |
12MT |
24MT |
< 5kg |
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Delivery time |
3 days |
5 days |
Stock available |
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Regeneration of 3A Molecular Sieve
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.
Attention
To avoid damp and pre-adsorption of organic before running, or must to be reactivated.
