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The Characteristics of Common Type A Molecular Sieve

The Characteristics of Common Type A Molecular Sieve


1. 3A molecular sieve


3A molecular sieve is an alkali metal aluminosilicate with a pore size of about 0.3 nanometers, which is mainly used to adsorb water.


It does not adsorb any molecules larger than 0.3 nanometers in diameter, and is also called zeolite 3A molecular sieve.


2. 4A molecular sieve


The 4A molecular sieve has a pore size of about 0.4 nanometers and can adsorb water, methanol, ethanol, hydrogen sulfide, sulfur dioxide, carbon dioxide, ethylene, propylene, etc. Any molecule with a diameter greater than 0.4 nanometers cannot be adsorbed, and the selective adsorption performance of 4A molecular sieve for water is higher than other molecules.


3. 5A molecular sieve


5A molecular sieve can adsorb any molecule smaller than the pore size, and is generally called calcium molecular sieve. It contains the functions of 3A and 4A molecular sieves, and can also adsorb C3-C4 n-alkanes, ethyl chloride, ethyl bromide, butanol, etc. 5A molecular sieve can be used for iso-hydrocarbon separation, pressure swing adsorption separation and co-adsorption of water and carbon dioxide.

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4A Molecular Sieve Can Adsorb Low Molecular Weight Compounds

4A Molecular Sieve Can Adsorb Low Molecular Weight Compounds

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