含锆ZSM-5分子筛上丙烯齐聚反应的研究

Zr/HZSM-5 zeolites were synthesized by hydrothermal method with water glass, aluminum sulfate, zirconium nitrate and n-butylamine (NBA) as the template. The synthesized samples have been characterized by XRD, SEM and NH3-TPD. The results of XRD indicate that the Zr/HZSM-5 is regularly ZSM-5 zeolite and the introducing of zirconium atom changed the size of unit cell. The SEM photographs show that the granule was a well crystallized claviform crystal about 3 μm～5 μm in length. The NH3-TPD curves show that the number of medium acid and strong acid sites increased almost linearly with the content of zirconium. Propene oligomerization reaction was carried out over the samples to evaluate the catalytic properties of Zr/ZSM-5 zeolites. The catalytic capability of Zr/HZSM-5 changed with varying of the number of medium acid and strong acid sites, which can accelerate the increasing of chain.