Molecular Sieves

Molecular sieve is a kind of adsorbent or membrane material with uniform micropores, mainly composed of silicon, aluminum, oxygen and other metal cations. Its pore size is equivalent to the general molecular size, and various fluid molecules are screened according to its effective pore size. Zeolite molecular sieves refer to those natural and synthetic crystalline aluminosilicates that have molecular sieve function. Molecular sieves can be produced in various forms, including molecular sieve beads, pellets, and desiccant powder, depending on the specific application requirements. 

In the world gas separation and purification is used in many industries.Molecular sieve is high performance adsorbent with excellent kinetic gas adsorption and separation capacity. Moleular sieve is widely used in various industries such as cryogenic air separation, PSA&VPSA oxygen generator, hydrogen purification, natural gas dehydration, ethanol dehydration, ethylene dehydration, propylene dehydration, ethanol dehydration, refrigerant dehydration, air break system, insulating glass, etc.

Zeolite molecular sieves are crystalline silicates or aluminosilicates, formed by silico-oxygen tetrahedrons or alumino-oxygen tetrahedrons connected by oxygen bridges to form pores and voids of molecular size. Cavity system, which has the characteristics of sieving molecules. However, with the in-depth research on the synthesis and application of zeolite molecular sieves, researchers have discovered phosphoaluminate zeolite molecular sieves, and the framework elements (silicon or aluminum or phosphorus) of zeolite molecular sieves can also be composed of B, Ga, Fe, Cr, Ge, I, V , Mn, Co, Zn, Be, and Cu, etc., and the size of the pores and cavities can reach 2 nm or more. Therefore, zeolite molecular sieves can be divided into silicon-aluminum zeolite molecular sieves, phosphorus-aluminum zeolite molecular sieves and framework heteroatom zeolite molecular sieves according to the composition of the framework elements.

Divided by channel size, zeolite molecular sieves with channel sizes less than 2 nm, 2~50 nm and greater than 50 nm are called microporous, mesoporous and macroporous molecular sieves, respectively. Due to its large pore size, it becomes a good carrier for large-size molecular reactions, but the pore wall of the mesoporous material is amorphous, so that its hydrothermal and thermal stability cannot meet the harsh conditions required by petrochemical applications.

Because it contains metal ions with a low electricity and a large ion radius and water in a combined state, water molecules are continuously lost after heating, but the crystal skeleton structure remains unchanged, forming many cavities of the same size, and the cavities have many diameters. The same micropores are connected. These tiny pores have uniform diameters, which can adsorb molecules smaller than the pore diameter into the inside of the pores, while repelling molecules larger than the pores, so that molecules with different shapes and diameters can be excluded. Molecules with different degrees of polarity, molecules with different boiling points, and molecules with different degrees of saturation are separated, that is, they have the function of “sieving” molecules, so they are called molecular sieves. At present, molecular sieves are widely used in metallurgy, chemical, electronics, petrochemical, natural gas and other industries.

Molecular sieve is a kind of aluminosilicate crystal. Because the pore size of zeolite molecular sieve is uniform, only when the molecular dynamics diameter is smaller than that of zeolite molecular sieve can it easily enter the cavity and be adsorbed. Therefore, zeolite molecular sieve is like a sieve for gas and liquid molecules. According to the size of the molecule to determine whether to be adsorbed. Because the zeolite molecular sieve has strong polarity in the crystalline cavity, it can interact with the molecules containing polar groups on the surface of the zeolite molecular sieve, or by inducing the polarization of the polarizable molecules to produce strong adsorption. This kind of polar or easily polarized molecule is easily adsorbed by polar zeolite molecular sieve, which reflects another adsorption selectivity of zeolite molecular sieve.

There are two main methods of molecular sieve regeneration: heating and high temperature regeneration and vacuum regeneration. Since the adsorption does not cause chemical changes, as long as you try to drive off the molecules that are concentrated on the surface, the zeolite molecular sieve has adsorption capacity again. This process is the reverse process of adsorption, called activation, or desorption or regeneration. Molecular sieve activation refers to the process in which adsorbates such as moisture adsorbed by the molecular sieve are driven out of the molecular sieve through high-temperature heating or vacuuming, so that the molecular sieve can restore the adsorption capacity.  

With over 20 years of experience, Jalon has established itself as one of the most trusted molecular sieves suppliers in China and worldwide. Our expertise and commitment to innovation set us apart from other molecular sieve manufacturers, ensuring that our customers receive the highest quality products and services.

Yes, at Jalon, we pride ourselves on being a customer-centric molecular sieve factory. Our expert team works closely with clients to develop customized molecular sieve solutions that are tailored to their specific requirements. Whether you need a unique pore size or a special formulation, we have the knowledge and resources to deliver a product that meets your exact specifications.

Jalon boasts one of the largest production capacities among molecular sieve manufacturers, with state-of-the-art facilities and automated production lines. As a leading molecular sieve supplier, we are well-equipped to handle large-scale orders without compromising on quality or delivery time. Our streamlined processes and advanced infrastructure ensure that we can meet the demands of even the most challenging projects.