The use and performance of 3A zeolite molecular sieve

3A molecular sieve is an alkali metal aluminosilicate. Sometimes, it is also called 3A zeolite molecular sieve.




Chinese name: 3A Molecule



English name: 3A Molecular Sieve



Silicon to aluminum ratio: SiO2/Al2O3≈2



CAS Number: 308080-99-1



Chemical formula: 2/3K2O·1/3Na2O·Al2O3·2SiO2·9/2H2O



Effective pore size: about 3Å (1Å=0.1 nm)



The 3A molecular sieve has a pore size of 3Å, which is mainly used to adsorb water and does not adsorb any molecules with a diameter greater than 3Å. According to the characteristics of industrial applications, molecular sieve has fast adsorption speed, regeneration times, crushing strength and anti-pollution ability, which improves the molecular sieve Utilizes efficiency and prolongs the service life of molecular sieve. It is a necessary adsorption material for deep drying, refining and polymerization of gas and liquid phases in the petroleum and chemical industries.

Main application areas:

1) Drying of various liquids (such as ethanol)

2) Drying of air, drying of insulating glass

3) Drying of refrigerant

4) Drying of natural gas and methane gas

5) Drying of unsaturated hydrocarbons and cracked gas, ethylene, acetylene, propylene, butadiene

store:
Indoors with room temperature and relative humidity not greater than 90%: avoid water, acid, alkali, and isolate the air, and store in airtight.

Regeneration conditions:

It can be regenerated and reused by heating and purging or evacuating at the same time.

(1) Removal of moisture: it can be heated to 150-300℃ with dry gas, such as nitrogen, hydrogen, or ordinary air, and passed into the molecular sieve bed under pressure, and then dry cold gas is passed into the adsorber to isolate the air Cool to room temperature;

(2) Removal of organic substances: water vapor can be used to first replace the adsorbed substance from the molecular sieve, and then heat to (1) to proceed. The regeneration can also be performed by superheated steam or inert gas through regeneration;

(3) The removal of gaseous substances can be regenerated by decompression removal.