Intersection of Application Fields of 5A and 4A Molecular Sieves

Gas Drying

• 5A Molecular Sieve: It has excellent hydrophilicity and can effectively adsorb moisture in gases. It is used for the drying of various gases such as natural gas and petroleum cracking gas, creating favorable conditions for subsequent processing and utilization. For example, before the long – distance transportation of natural gas, 5A molecular sieve is used for deep dehydration to prevent pipeline corrosion or blockage by hydrates caused by water.
• 4A Molecular Sieve: It is also a commonly used gas desiccant and is widely applied in the drying of air, nitrogen, hydrogen, etc. In the electronics industry, when drying high – purity nitrogen and hydrogen used in chip manufacturing processes, 4A molecular sieve ensures that the water content in the gases is extremely low, avoiding impacts on the production of precision electronic devices.

Gas Purification

• 5A Molecular Sieve: It can adsorb acidic gases such as carbon dioxide and hydrogen sulfide. In processes like coal gasification and syngas purification, it can remove these harmful gases, improve gas quality, facilitate subsequent chemical reactions, and reduce equipment corrosion.
• 4A Molecular Sieve: It also has a certain adsorption capacity for impurities such as carbon dioxide and hydrogen sulfide in gases. It is often used for the preliminary purification of gases. In some small – scale gas purification devices, 4A molecular sieve can be used as a pre – purification agent to remove most of the acidic gases and moisture.

Petrochemical Field

• 5A Molecular Sieve: In the petroleum refining process, it is used in processes such as dewaxing of lubricating base oil. By adsorbing normal paraffins, it improves the low – temperature fluidity and performance of lubricating oil. Meanwhile, it plays a role in the separation and purification of petroleum cracking gas, helping to improve product quality and yield.
• 4A Molecular Sieve: In the petrochemical industry, it can be used as a catalyst support, providing good support and dispersion for the catalyst, which helps to improve the activity and stability of the catalyst. At the same time, it can also be used in the pretreatment processes of petroleum products such as dehydration and desulfurization, providing high – quality raw materials for subsequent deep processing.

Other Fields

• 5A Molecular Sieve: It is also applied in gas purification and drying in industries such as pharmaceuticals and food. For example, in the production of drugs, it purifies and dries the protective gas filled into drug packaging to ensure the stable quality of drugs.
• 4A Molecular Sieve: In the construction industry, it is used as a desiccant in insulating glass to prevent water vapor condensation between the glass panes, which could affect the light transmittance and thermal insulation performance of the glass. It is also commonly used as a desiccant in pharmaceutical and food packaging to prevent drugs and food from getting damp and deteriorating.