Abstract: The LiX with nearly 100% Li⁺ was ion exchanged with different Mⁿ⁺ (Mg²⁺, Zn²⁺, Ni²⁺ and La³⁺) in water solution, then the adsorption isotherms of these zeolites were measured at 25℃. The data demonstrate that the higher the Mⁿ⁺ in the LiX is, the lower the adsorptive separation property of the zeolites with N₂ and Ar is. This is likely to be caused by the outflow of the Li⁺ locating at the active site for N₂ adsorption in the LiX. It is clear that LiX zeolite is the best adsorbent for separating N₂ and Ar among the adsorbents studied in thid paper.

Key words: LiX, multivalent ions, adsorption isotherm, separation of N₂ and Ar