Pure Natural 4a Molecular Sieve Desiccant For Ammonia Refrigerator Compressor
Overview
4a molecular sieve is a synthetic zeolite of A-type crystal structure in potassium-sodium form with a pore opening of 4 angstroms (0.4 nm). Adsorb water, methanol, ethanol, hydrogen sulfide, sulfur dioxide, carbon dioxide, ethylene, propylene, NH3, H2S, CO, methyl chloride, methyl bromide, methyl acetylene, ethane. Does not adsorb any molecular diameter greater than 4 angstroms (including propane). The more powerful selective adsorption capacity than any other molecular sieve. It is mainly applied in the drying gas, liquid. Widely used in drying oilfield associated gas and natural gas. Also widely used for the dehydration of ethanol.
| Molecular Formula | Na2O·Al2O3·2SiO2·9/2H2O |
| SiO2/ Al2O3 | ≈ 2 |
| Normal Pore Opening | 4 Angstroms (Å) |
| Regeneration temp. (°C) | 200-315 |
| Advantages | High Stability; High Strength; Large Water Absorption; Low Attrition; Deep Dehydration |
Technical Index
| Molecular Sieve 4A Typical Physical Properties |
| Items | Unit | 8*12 Mesh | 4*6 Mesh |
| Bead Size | mm | 1.6-2.5 | 3.0-5.0 |
| Bulk Density | g/ml ≥ | 0.70-0.82 | 0.65-0.80 |
| Equilibrium Water Capacity @ 25℃ | wt% ≥ | 20.5-22.5 | 20.5-22.5 |
| Equilibrium Methanol Capacity | wt% ≥ | 15.0 | 15.0 |
| Heat of Adsorption | BTU/lb of H2O | 1800 | 1800 |
| Crush Strength | Point Contact | N ≥ | 30-80 | 85-160 |
| Variation Coefficient | - | 0.3 | 0.3 |
| Attrition Rate | wt% ≤ | 0.1 | 0.1 |
| Size Qualification | % ≥ | 98 | 98 |
| Package Moisture | wt% ≤ | 1.5 | 1.5 |
| The interval value of the indexes above are on the basis of the different grade of Molecular Sieve 4A |
Storage
The molecular sieve shall be stored at room temperature, in which the relative humidity does not exceed 90%, and be not exposed to air, and prevented against water, acids and alkalizes.
Attention
1. The product cannot be exposed in the open air and should be stored in dry condition with the air-proof package.
2. The product should be regenerated after a certain period of adsorption. The appropriate regenerated temperature would be better below 350°C.
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