【摘要】 系统研究了不同金属（ 碱金属、碱土金属、过渡金属、稀土金属） 氧化物改性Ｈβ沸石的甲苯和１ ，３ ，５ － 三甲苯烷基转移反应活性以及产物对二甲苯的选择性。利用吡啶吸附红外光谱方法（ＩＲ） 研究了沸石表面的酸性，并与反应性能进行关联，得出较好的规律。研究发现该反应的活性中心来自Ｂ 酸和Ｌ 酸两方面的贡献，但必须有Ｂ 酸存在。碱金属氧化物改性Ｈβ沸石对该反应是不适宜的，Ａｇ 、Ｚｒ 氧化物为较好的助催化剂。更多还原

【Abstract】 In this paper,the transalkylation reaction of toluene and 1,3,5-trimethylbenzene over different metal oxides (alkali,alkaline earth,transition and rare earth metal oxides.)modified Hβ zeolites have been investigated.Toluene-conversion,selectivity to the xylene at 380 ℃,WHSV=2 h -1 and surface acidity are discussed in order to get a deeper insight into correlation between activity and acidity of zeolites obtained by pyridine adsorption IR.This reaction is catalyzed by both B and L acid centers.There must be B acid center existed on the catalyst surface.Modification by alkali metal oxides is not suitable for the reaction,while Ag,Zr oxides are good promoters of Hβ zeolites.更多还原