3A 4A 5A 10X 13X Drying Molecular Sieve Desiccant

Molecular sieves are crystalline metal alumino silicates having a three dimensional interconnecting network of silica and alumina tetrahedra. Natural water of hydration is removed from this network by heating to produce uniform cavities which selectively adsorb molecules of a specific size.

A 4 to 8-mesh sieve is normally used in gasphase applications, while the 8 to 12-mesh type is common in liquidphase applications. The powder forms of the 3A, 4A, 5A and 13X sieves are suitable for specialized applications.

Long known for their drying capacity (even to 90°C), molecular sieves have recently demonstrated utility in synthetic organic procedures, frequently allowing isolation of desired products from condensation reactions that are governed by generally unfavorable equilibria. These synthetic zeolites have been shown to remove water, alcohols (including methanol and ethanol), and HCl from such systems as ketimine and enamine syntheses, ester condensations, and the conversion of unsaturated aldehydes to polyenals

Application

3A: 1.liquid drying,such as ethyl alcohol

2.air drying

3. refrigerant drying

4.Natural gas, methane gas drying

5.Saturated hydrocarbons and cracking gas, ethylene, acetylene, propylene, butadiene drying

4A: Adsorbed water, methanol, ethanol, hydrogen sulfide, sulfur dioxide, carbon dioxide, ethylene, propylene

5A: 1.natural gas drying, desulfurization, removal CO2;

2.nitrogen-oxygen separation, hydrogen and nitrogens eparation, produce oxygen, nitrogen and hydrogen;

3.petroleum wax, from branched hydrocarbons, cyclic hydrocarbons separated n-hydrocarbons.

13X: 1.air purification in air separation unit, removal of water and carbon dioxide

2.natural gas, liquefied petroleum gas, liquid hydrocarbons drying and desulphurization

3. general gas deep drying

Hand & Storage Recommendation

Molecular Sieve should be handled to avoid generation of dusty conditions at the workplace. Storage in a dry warehouse is recommended. Open packages should be resealed to prevent contamination and adsorption of water or other gases and vapors. The material in bag-in-box should be used within 12 months,while bag-in-steel drum should be used within 24 months.

Regeneration

To achieve good operating performance and long life as much as possible, after a certain period of time use must be regenerated .

After correct molecular sieve regeneration , make it get the low attenuation of mechanical properties and adsorption

There are two basic approaches:

Temperature variation .

Generally used in the preheating gas heating, purge molecular sieve to about 200 º C, and stripping down the adsorbate .

Variable pressure .

Usually used in the gas phase adsorption process.Maintain a constant temperature adsorbent and by reducing

pressure and backing purge inert gas , to remove the adsorbate.