Molecular sieve manufacturer talks about the application of molecular sieves in various fields

Molecular sieve is a synthetic hydrated aluminosilicate or natural zeolite with the function of screening molecules. The following molecular sieve manufacturer will tell you about the application of molecular sieves in various fields.

1. Application in the field of drying and purification
(1) Dehydration. Air-drying can be carried out by utilizing the polar hydrophilicity of zeolite molecular sieves with low silica-alumina ratio (such as A-type, X-type, etc.).
(2) Purify pollutants in the air. With the rapid development of the industry, the emissions of H2S, SO2, NOX and formaldehyde are increasing, and the pollution caused by it has brought serious harm to people's lives and the environment.

2. Application in the field of adsorption and separation
(1) Separation of mixed xylenes. Mixed xylene is generally used as a solvent and gasoline blending agent. It is sold at a low price and is a serious waste of resources. However, the four isomers of mixed xylene: ethylbenzene, p-xylene, m-xylene and o-xylene are important chemical raw materials, so they need to be separated one by one.
(2) Separation of N2/O2. In the pressure swing adsorption (PSA) method, the zeolite molecular sieve utilizes the equilibrium adsorption difference of N2/O2 on its surface to selectively adsorb N2. Due to the large polarizability of N2, N2 is closely related to the cations in the zeolite molecular sieve and its polar surface. The interaction between them is stronger than that of O2. LiA zeolite molecular sieve has higher N2/O2 selectivity ratio and N2 adsorption capacity, but its thermal stability is poor. Therefore, A-type zeolite molecular sieve after Li+ and alkaline earth metal mixed cation exchange has higher N2/O2 selectivity Separation factor, N2 adsorption capacity and higher thermal stability. In addition, the X-type zeolite molecular sieve with low silica-alumina ratio has also attracted people's attention. Various ion exchanges have been carried out, and its N2/O2 separation selectivity is high and thermal stability is good.
(3) Increase gasoline octane number. Since the octane number of isoparaffin is much higher than that of n-paraffin, adsorption separation method can be used to remove n-paraffin.

3. Application in the field of catalysis
Zeolite molecular sieve has a complex and changeable structure and a unique pore system, which is a catalyst with excellent performance.