NaY is a sodium type molecular sieve with a y-type crystal structure and is an alkali metal silicoaluminate.Nay molecular sieve has a spatial three-dimensional structure composed of Si and Al tetrahedral structural units and can absorb molecules with a critical diameter of no more than 10A.Because of its characteristics, such as adsorption, adsorption, cation exchange, can be used for catalytic cracking catalyst preparation, drying dehydration, hydrodesulfurization, catalyst support, oil refining and chemical, metallurgy, electronics, nuclear industry and other industries of gas purification