... years professional manufacturer for molecular sieve 3A, 4A,5A, 13X appearance:sphere /pellet ISO9001:2000 Product descriptionMolecular sieve is a material containing ... that is used as an for gas and liquid. Molecular sieves are often utilized in the industry, especially for ... -is used in this case. Methods for regeneration of molecular sieves include pressure change (as in oxygen concentrators), heating ...