Abstract: The solid-state ion exchange between hydrated 13X zealite and alkaline metal salt was studied.XRD patterns and IR spectra of the exchanged samples show that the exchange reaction can occur at ambient temperature.The exchange extent can be enhanced by repeated exchange.Compared with K⁺ ion, the bulky Cs⁺ ion is more difficult to replace Na⁺ ion.The calcination at a higher temperature is favourable to increasing the exchange degree of Cs⁺-exchanged sample.

Key words: Solid-state ion exchange, 13X zeolite, Alkaline metal salts