Molecular sieves are sophisticated materials valued for their precise, uniform pore sizes, which enable selective adsorption of molecules. The selection of the correct molecular sieve type is crucial for optimizing performance in various industrial applications, from drying and purification to gas separation. NINGBO INNO PHARMCHEM CO.,LTD. offers a comprehensive range of molecular sieves, including the widely used 3A, 4A, 5A, and 13X types, each tailored for specific needs.

The classification of molecular sieves is primarily based on their pore aperture, measured in Angstroms (Å). This physical characteristic dictates which molecules they can effectively adsorb while excluding larger ones.

3A Molecular Sieve: With a pore size of 3 Å, this type is ideal for dehydrating polar molecules like ethanol and methanol, and for drying insulating glass and petroleum cracked gas. Its small pores prevent the adsorption of larger organic molecules, ensuring selective water removal.

4A Molecular Sieve: Featuring a pore size of 4 Å, the 4A sieve is a versatile general-purpose adsorbent. It is effective in drying natural gas, refrigerants, and various chemical gases and liquids. It can adsorb water, ammonia, and carbon dioxide. Its applications include drying compressed air and acting as a dehydrator in paints and coatings.

5A Molecular Sieve: With a pore size of 5 Å, the 5A sieve is capable of adsorbing larger molecules, including normal alkanes and larger unsaturated hydrocarbons. It is commonly used in the petroleum industry for gas stream purification, separating normal paraffins from branched-chain and cyclic hydrocarbons, and in the production of highly purified hydrogen.

13X Molecular Sieve: The largest among the common types, 13X sieves have a pore size of 10 Å. This makes them suitable for adsorbing larger molecules, including oxygen, nitrogen, CO2, and sulfur compounds. They are extensively used in air separation units for removing CO2 and H2O, and in natural gas processing for desulfurization and deep drying. Their high adsorption capacity also makes them valuable as catalyst carriers.

NINGBO INNO PHARMCHEM CO.,LTD. understands that selecting the right molecular sieve involves considering not only the target molecules but also operating conditions such as temperature and pressure. Our team provides expert guidance to help you choose the optimal sieve for your specific application, whether you need to buy molecular sieves for critical drying processes or advanced gas separation. We ensure that our products deliver the performance and reliability your operations demand.