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4A molecular sieve is a sodium exchange, the pore size of 4A, can be called sodium molecular sieve, can adsorb water, methanol, ethanol, hydrogen sulfide, sulfur dioxide, carbon dioxide, ethylene, propylene and so on diameter less than 4A molecules, do not adsorb diameter greater than 4A of any molecule (including propane), the selection of water adsorption performance is higher than any other molecule. It is one of the most used molecular sieve varieties in industry. It is widely used in the drying of gases and liquids, and can also be used for the refining and purification of some gases or liquids, such as the preparation of argon.
Main application areas:

• Water treatment -- hard water softener can replace the sulfonated coal widely used in China at present, thereby reducing costs;
•  Metallurgical industrial -- separation agent, separation, extraction of potassium, rubidium, cesium in brine. It is used in industry to enrich, separate and extract  metals Art process;
•  Petrochemical industry -- catalyst, desiccant, adsorbent;
•  Automotive -- Removal of trace water from automotive brake systems;
•  Medicine -- silver carrying zeolite antibacterial agent;
• Drying of air, natural gas, refrigerants and hydrocarbons.