5A

Molecular sieve is a kind of aluminosilicate compound with cubic lattice. It is mainly composed of silicon and aluminum connected by oxygen bridges to form a hollow skeleton structure. These pores can adsorb molecules smaller than their diameters into the interior of the cavity, and have preferential adsorption capacity for polar molecules and unsaturated molecules, so they can absorb molecules with different polarity, saturation, molecular size and boiling point. So that cause it have the function of “sieving” molecules, that is why they are called molecular sieves.

Molecular sieves have excellent properties such as high adsorption capacity, strong thermal stability, high temperature resistance, and strong selectivity that other adsorbents do not have, making molecular sieves widely used in organic chemical, petrochemical, and various fine chemical industries. Its excellent adsorption performance ( When used as a desiccant, a molecular sieve can absorb up to about 22% of its own weight of water), and it is also an excellent adsorbent for air separation and dehydration, air treatment and purification, and even lots of chemical gas dehydration. It also become more and more popular in the field of waste gas treatment and water purification.

It can be mainly used in the following industries: natural gas, chemical gas treatment, gas separation, water purification treatment, Architectural glass assembly trying chemical industry, medicine, fertilizer manufacturers, paint coatings, medical oxygen production, packaging, automobile exhaust treatment, etc.

5A molecular sieve : chemical formula: 3/4CaO·1/4Na2O·Al2O3·2 SiO2·9/2H2O silicon-aluminum ratio: SiO2/ Al2O3≈2 effective pore diameter: about 0.5nm

5A molecular sieve refers to calcium type A aluminosilicate. 5A molecular sieve can adsorb molecules whose critical diameter is not larger than 5A. All molecules that can be adsorbed on 3A and 4A molecular sieves can be adsorbed on 5A. N-alkanes can be separated from branched and cyclic alkanes by a selective adsorption process. It is currently used industrially in the large-scale separation process of n-isoparaffins. 5A molecular sieve can also be used for hydrogen production by pressure swing adsorption.