Molecule selecting zeolite 5A for insulating glass processing
Introduction
5A Molecular Sieveis an alkali alumino silicate; it is the calcium form of the Type A crystal structure. Type 5A has an effective pore opening of 5 angstroms (0.5 nm). It will adsorb molecules with a kinetic diameter of less than 5 Angstrom and exclude those larger.
It is especially suitable for PSA adsorber applications where it may be used for the separation of normal- and iso- paraffins (C4 to C6 species), in PSA hydrogen purification and in oxygen concentrators.
Typical Chemical Formula
0.7 CaO . 0.3 Na2O . Al2O3 . 2 SiO2 . 4.5H2O
SiO2 : Al2O3 ≈2
Application
The strong ionic forces of the divalent calcium ion makes it an excellent adsorbent to remove water, CO2, H2S from sour natural gas streams, while minimising COS formation. Light mercaptans are also adsorbed.
It is also used for the separation of normal- and iso paraffins.
Production of high purity N2, O2, H2 and inert gases from mixed gas streams.
Technical Parameter
| 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 | ≥96 | ≥96 |
| Bulk density | g/ml | ≥0.64 | ≥0.64 | ≥0.66 | ≥0.66 |
| Wear ratio | % | ≤0.20 | ≤0.40 | ≤0.20 | ≤0.20 |
| Crushing strength | N | ≥30/cm | ≥45/cm | ≥30/piece | ≥60/piece |
| Static water adsorption | % | ≥21.5 | ≥21.5 | ≥21.5 | ≥21.5 |
| Water content, as shipped | % | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 |
Zeolite granular 3A molecular sieve as adsorbent for Insulating Glass
Molecular Sieve 3A is an alkali metal alumino-silicate; 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 maximises lifetime when dehydrating such molecules.
1. Typical Chemical Formula
0.45 K2O . 0.55 Na2O . Al2O3 . 2 SiO2 . 4.5H2O
SiO2 : Al2O3 ≈2
2. Technical Parameter
| 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 | ≥96 | ≥96 |
| Bulk density | g/ml | ≥0.68 | ≥0.68 | ≥0.68 | ≥0.68 |
| Wear ratio | % | ≤0.20 | ≤0.25 | ≤0.10 | ≤0.10 |
| Crushing strength | N | ≥45/cm | ≥60/cm | ≥30/piece | ≥70/piece |
| 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 |
3. Typical Application
1) Drying of unsaturated hydrocarbons (e.g. ethylene, propylene, butadien)
2) Cracked Gas Drying
3) Drying of natural gas, if COS minimization is essential, or a minimum co-adsorption of hydrocarbons is required.
4) Drying of highly polar compounds, such as methanol and ethanol
5) Drying of liquid alcohol
6) Static,( 58415131,non-regenerative) dehydration of insulating glass units, whether air filled or gas-filled.
7) Drying of refrigerants
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