Patent ID: 7452840
Filing Date: 2008-11-18
Classification: B01J,C07C,C12C

Abstract:
1. An agglomerated zeolitic adsorbent comprising zeolite X and an inert binder, the inert binder containing at least 80% by weight of clay which has undergone zeolitization by the action of an alkaline solution, the zeolite X having an Si/Al ratio such that 1.15<Si/Al≦1.5 and having exchangeable cationic sites, at least 90% of the exchangeable cationic sites of the zeolite X of which are occupied either by barium ions alone or by barium ions and potassium ions, the exchangeable sites occupied by potassium ions optionally representing up to ⅓ of the exchangeable sites occupied by barium ions and potassium ions, wherein any remaining exchangeable cationic sites being occupied by alkali metal or alkaline earth metal ions other than barium, the Dubinin volume of said adsorbent measured by nitrogen adsorption at 77° K after degassing under vacuum at 300° C. for 16 h, is greater than or equal to 0.240 cm