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 maximizes lifetime when dehydrating such molecules.
3A - Zeolites are available in beads of 1-2 mm,( 58413778, 58413760, 58413739,10x18 mesh) 2-3 mm,( 58413779, 58413761, 58413740,8x12 mesh) , 2.5-5 mm,( 58413780, 58413762, 58413741,4x8 mesh) and as powder, and in pellet 1.6”, 3.2”.
Technical Parameter
| 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 | ≥98 | ≥98 |
| Bulk density | g/ml | ≥0.65 | ≥0.65 | ≥0.70 | ≥0.70 |
| Wear ratio | % | ≤0.20 | ≤0.25 | ≤0.10 | ≤0.10 |
| Crushing strength | N | ≥45/cm | ≥60/cm | ≥30/p | ≥70/p |
| Static wateadsorption | % | ≥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 |
Packaging & Shipping
| Package Type | Container Load Capacity | Delivery time | Quality Insurance | Payment Terms |
| 20 GP | 40 GP |
| Steel drum, 150kg/drum | 12000 kg | 24000 kg | Within 7-10 days | Chinese National Standard; Offer quality assurance as request. | T/T, L/C, Paypal, West Union |
Attention To avoid damp and pre-adsorption of organic before running, or must to be reactivated.
Typical Application
- Drying of unsaturated hydrocarbons (e.g. ethylene, propylene, butadien)
- Cracked Gas Drying
- Drying of natural gas, if COS minimization is essential, or a minimum coadsorption of hydrocarbons is required.
- Drying of highly polar compounds, such as methanol and ethanol
- Drying of liquid alcohol
- Static,( 58413781, 58413763, 58413742, 58413725,non-regenerative) dehydration of insulating glass units, whether air filled or gas-filled.
- Drying of refrigerants
Typical Chemical Formula
0.4K2O 0.6Na2O Al2O3 2.OSiO2 4.5H2O
SiO2 : Al2O3 ≈2
Regeneration
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.
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