5A molecular sieve, is an alkali metal silicaluminate, pore size 5A, is A type A crystal structure of calcium type, can adsorb any molecule with a diameter of less than 5A. In addition to the efficacy of 3A and 4A molecular sieves, it can also adsorb C3-C4 n-alkanes, chloroethane, bromoethane, butanol and so on. 5A molecular sieve, select high adsorption, adsorption speed, especially suitable for pressure swing adsorption, is the best in the pressure swing adsorption industry.