Synthesis of Al/La-Cross-Linked Montmorillonite and Catalytic Property

Al/La-pillared and Al-pillared montmorillonite were prepared from the raw material Na-montmorillonite,and characterized by XRD,nitrogen adsorption,NH3-TPD,SEM and particle distribution.The ketalation was used as a probe reaction to study the catalyst activity of Al/La-pillared montmorillonite,and compared with Al-pillared montmorillonite.The results show that the crystal form of Al/La-pillared montmorillonite is more better than Al-pillared montmorillonite,the interlamellar spacing is more bigger than Na-montmorillonite.When n(Al)/n(La) is 25∶1 and n(Al+La)/n(Na-mont) is 2,the interlamellar spacing of Al/La-pillared montmorillonite is 1.81 nm,the surface area of BET is 183 m2/g,and the temperature of NH3-desorption(228 ℃) than Al-pillared montmorillonite is 70 ℃.The yield of cyclohexanone ethylene ketal can reach 85% in the presence of Al/La-pillared montmorillonite.