Zeolite 3A Molecular Sieve
Chemical Formula: 0.45 K2O. 0.55 Na2O. Al2O3. 2 SiO2. 4.5H2O
Silica-alumina Ratio: SiO2/ Al2O3≈2
Aperture: 3 Å
molecular sieve type 3A is a kind of alkali aluminosilicate and able to absorb moleculAR with their critical diameters no more than 3A. it is the potassium form of the type A crystal structure.The application characteristics of this molecular sieve include fast adsorption speed, frequent regeneration ability, crushing resistance and pollution resistance. These features can improve its use efficiency and prolong its usage life. 3A molecular sieves are the necessary desiccant in petroleum and chemical industries for refining oil, polymerization, and chemical gas-liquid depth drying.
Typical Application
Drying of unsaturated hydrocarbons (e.g. ethylene, propylene, butadiene)
Cracked Gas Drying
Drying of natural gas, if COS minimization is essential, or a minimum co-adsorption of hydrocarbons is required.
Drying of highly polar compounds, such as methanol and ethanol
Drying of liquid alcohol Static, (non-regenerative) dehydration of insulating glass units, whether air filled or gas-filled.
Drying of refrigerants
Technical parameters
| 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 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 |
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.
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 1.6”, 3.2”.
Attention
To avoid damp and pre-adsorption of organic before running, or must to be reactivated.
