English 
Sphere 1.7-2.5mm Pellet 1.6mm Zeolite 4A Molecular Sieve as Small Packaging Desiccant
Chemxin Molecular Sieve type 4A is an alkali aluminosilicate; it is the sodium form of the Type A crystal structure. 4A molecular sieve has an effective pore opening of about 4 angstroms (0.4nm). 4A molecular sieve will adsorb most molecules with a kinetic diameter of less than 4 angstroms and exclude those larger. Such adsorb-able molecules include simple gas molecules such as oxygen, nitrogen, carbon dioxide and straight chain hydrocarbons. Branched chain hydrocarbons and aromatics are excluded.
Technical Parameter:
| Model | 4A | |||
| Color | Light gray | |||
| Nominal pore diameter | 4 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) | ≥35/piece | ≥85/piece | ≥30/piece | ≥70/piece |
| Static H2O adsorption (%) | ≥21.5 | ≥21.5 | ≥21.5 | ≥21.5 |
| Static methanol adsorption (‰) | ≥15 | ≥15 | ≥15 | ≥15 |
| Water content (%) | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 |
| Typical Chemical Formula | Na2O . Al2O3 . 2SiO2 . 4.5 H2O SiO2 : Al2O3 ≈2 | |||
| Typical Application | a) Drying and removing of CO2 from natural gas, LPG,air, inert and atmospheric gases, etc e) For fire escape mask g) For filter | |||
Regeneration:
Chemxin molecular sieve Type 4A 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 4A molecular sieve, a temperature of 250-280°C is required. A properly regenerated molecular sieve can give moisture dew points below -60°C.
The outlet concentrations on a pressure swing process will depend on the gas present, and on the conditions of the process.
Size:
4A - 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.
Sphere 1.7-2.5mm Pellet 1.6mm Zeolite 4A Molecular Sieve as Small Packaging Desiccant
Chemxin Molecular Sieve type 4A is an alkali aluminosilicate; it is the sodium form of the Type A crystal structure. 4A molecular sieve has an effective pore opening of about 4 angstroms (0.4nm). 4A molecular sieve will adsorb most molecules with a kinetic diameter of less than 4 angstroms and exclude those larger. Such adsorb-able molecules include simple gas molecules such as oxygen, nitrogen, carbon dioxide and straight chain hydrocarbons. Branched chain hydrocarbons and aromatics are excluded.
Technical Parameter:
| Model | 4A | |||
| Color | Light gray | |||
| Nominal pore diameter | 4 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) | ≥35/piece | ≥85/piece | ≥30/piece | ≥70/piece |
| Static H2O adsorption (%) | ≥21.5 | ≥21.5 | ≥21.5 | ≥21.5 |
| Static methanol adsorption (‰) | ≥15 | ≥15 | ≥15 | ≥15 |
| Water content (%) | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 |
| Typical Chemical Formula | Na2O . Al2O3 . 2SiO2 . 4.5 H2O SiO2 : Al2O3 ≈2 | |||
| Typical Application | a) Drying and removing of CO2 from natural gas, LPG,air, inert and atmospheric gases, etc e) For fire escape mask g) For filter | |||
Regeneration:
Chemxin molecular sieve Type 4A 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 4A molecular sieve, a temperature of 250-280°C is required. A properly regenerated molecular sieve can give moisture dew points below -60°C.
The outlet concentrations on a pressure swing process will depend on the gas present, and on the conditions of the process.
Size:
4A - 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.
