Xi'an Lvneng Purification Technology Co.,Ltd.
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3A 4A 5A 13X Zeolite Molecular Sieve For Air Separation Desiccant
Products Introduction
3A molecular sieve use: drying of various liquids (such as ethanol); drying of air; drying of refrigerants; drying of natural gas and methane gas; drying of unsaturated hydrocarbons and cracking gas, ethylene, acetylene, propylene, butadiene.
The use of 4A molecular sieve: deep drying of air, natural gas, alkanes, refrigerants and other gases and liquids; preparation and purification of argon gas; static drying of drug packaging, electronic components and perishable substances; as dehydrants in paint, fuel and paint.
5A molecular sieve uses: pressure swing adsorption, air purification, dehydration and carbon dioxide.
13X molecular sieve uses: air separation unit gas purification, removal of water and carbon dioxide; natural gas, liquefied petroleum gas, liquid hydrocarbon drying and desulfurization; general gas deep drying.
Technical Index
| Air Separation Molecular Sieve Typical Physical Properties | ||||
| Items | Unit | 4*6 Mesh | 3*5 Mesh | |
| Bead Size | mm | 3.0-5.0 | 4.0-6.0 | |
| Bulk Density | g/ml ≥ | 0.65-0.80 | 0.65-0.80 | |
| Equilibrium Water Capacity @ 25℃ | wt% ≥ | 24.0-27.0 | 24.0-27.0 | |
| Equilibrium Carbon Dioxide Capacity | wt% ≥ | 18 | 18 | |
| Heat of Adsorption | BTU/lb of H2O | 1800 | 1800 | |
| Crush Strength | Point Contact | N ≥ | 80-130 | 80-130 |
| Variation Coefficient | - | 0.3 | 0.3 | |
| Attrition Rate | wt% ≤ | 0.1 | 0.1 | |
| Size Qualification | % ≥ | 97 | 97 | |
| Package Moisture | wt% ≤ | 1.5 | 1.5 | |
| The interval value of the indexes above are on the basis of the different grade of Air Separation Molecular Sieve | ||||
Regeneration:
Regeneration in typical cyclic systems constitutes removal of the adsorbate from the molecular sieve bed by heating and purging with a carrier gas. Sufficient heat must be applied to raise the temperature of the adsorbate, the adsorbent and the vessel to vaporize the liquid and offset the heat of wetting the molecular-sieve surface. The bed temperature is critical in regeneration. Bed temperatures in the 175-260° range are usually employed for type 3A. This lower range minimizes polymerization of olefins on the molecular sieve surfaces when such materials are present in the gas. Slow heat up is recommended since most olefinic materials will be removed at minimum temperatures; 4A, 5A and 13X sieves require temperatures in the 200-315 °C range.
After regeneration, a cooling period is necessary to reduce the molecular sieve temperature to within 15° of the temperature of the stream to be processed. This is most conveniently done by using the same gas stream as for heating, but with no heat input. For optimum regeneration, gas flow should be countercurrent to adsorption during the heat up cycle, and concurrent (relative to the process stream) during cooling. Alternatively, small quantities of molecular sieves may be dried in the absence of a purge gas by oven heating followed by slow cooling in a closed system, such as a desiccator.
Packaging & Shipping
Packing specification: 25kg plastic woven bag or ton bag or bucket packaging, also can be packed according to your requirement.
Product transport requirements: keep dry, away from inflammable, corrodible, toxic goods.