Abstract: The dechlorination effects of various molecular sieves were compared and screened, and the results showed that NaY molecular sieves had good dechlorination performance. Molecular sieve adsorbent was prepared by kneading method with NaY molecular sieve powder as active component, and the effect of preparation conditions on the dachlorination performance of the adsorbent was investigated with ionic liquid alkylate as raw material. The experimental results showed that using the adsorbent prepared under the optimized conditions of the mass ratio of NaY powder to binder being 2.0，the calcination temperature of 400 ℃ for 3 h，and at the adsorption temperature of 25 ℃ and LHSV of 1.0h^-1, the penetration chlorine capacity could reach 3.11% ,and the adsorbent indicated a good reusability.

Key words: NaY molecular sieve, ionic liquid, alkylate, adsorptive dichlorination, organic chlorine