manufacture sphere 1.7-2.5 mm 3a molecular sieve zeolite for ethanol ethylene propylene butadien dehydration
manufacture sphere 1.7-2.5 mm 3a molecular sieve zeolite for ethanol ethylene propylene butadien dehydration
Chemxin Molecular Sieve type 3A is an alkali metal aluminosilicate; 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.
Technical Parameter:
| Model | 3A | |||
| Color | Light gray | |||
| Nominal pore diameter | 3 angstroms | |||
| Shape | Sphere | Pellet | ||
| Diameter (mm) | 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 (%) | ≥98 | ≥98 | ≥96 | ≥96 |
| Bulk density (g/ml) | ≥0.70 | ≥0.70 | ≥0.68 | ≥0.68 |
| Wear ratio (%) | ≤0.20 | ≤0.20 | ≤0.40 | ≤0.40 |
| Crushing strength (N) | ≥55/piece | ≥85/piece | ≥30/piece | ≥50/piece |
| Static H2O adsorption (%) | ≥21 | ≥21 | ≥21 | ≥21 |
| Ethylene adsorption (‰) | ≤3.0 | ≤3.0 | ≤3.0 | ≤3.0 |
| Water content (%) | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 |
| 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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Regeneration:
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.
Size:
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.
Attention:
To avoid damp and pre-adsorption of organic before running, or must to be reactivated.
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