The Nature of the Catalytic Active Sites of Cationic Zeolites(X, Y)

The na re of the catalytic active sites of cationic zeolites(X, Y)for methylmigration of anisole was studied using flow reactor. The order of catalytic activities were as follows; RbX KX NaX=LiX at 3000C, RbY KY NaY LiY at 3500C, BaX SrX CaX MgX at 275eC, BaY SrY CaY MgY at 2500C. This result indicates that the cationic zeolites containing the stronger electrostatic field become more active, The same result except the cases of alkali metal X and MgX was also obtained by the comparison of electrostatic field and the catalytic activities determined by the temperature for 10% anisole conversion. Upon addition of water, the order of increase of anisole conversion on alkali earth metal zeolites except MgX and MgY was equal to the order of electrostatic field strength Ba Sr(Ca). While that on alkali metal X was as follows; Li Rb=Na K. This result did not coincide with electrostatic field strength, but it had good correlation with the facility of decationation of alkali metal X. The catalytic activity of NaX was decreased gradually as NaOH was annexed, and the addition ef water te NaX annexed with NaOH allowed anisole conversion to increase to a constant value, 11 mol %o, regardless of the amount of NaOH.