3A molecular sieve, is an alkali metal silicaluminate, pore size 3A, is A type A crystal structure of potassium type. It is mainly used to adsorb water and does not adsorb any molecule with a diameter greater than 3A. 3A molecular sieve has the advantages of faster adsorption speed, more regeneration times, higher crushing strength, stronger anti-pollution ability, greater utilization efficiency and longer service life. It is gas liquid in petroleum and chemical industryThe desiccant of choice for deep phase drying, refining and polymerization.