【摘要】 本文系统地考察了甲苯和１，３，５－三甲苯在以Ｈβ为基质的改性沸石分子筛上烷基转移反应。探讨了金属Ａｌ，Ｂｉ和非金属Ｐ改性Ｈβ沸石对甲苯和１，３，５－３甲苯的转化率和对产物二甲苯的选择性影响规律。用氨程序升温脱附（ＮＨ３－ＴＰＤ）和吡啶吸附红外（ＩＲ）方法考察了Ｈβ沸石表面酸性和酸中心分布以及改性对β沸石表面酸性的影响。发现：１）用Ａｌ改性后，催化活性大大超过未改性的Ｈβ分子筛；２）Ｌ酸中心对改性Ｈβ分子筛的烷基转移反应活性起重要作用。更多还原

【Abstract】 In this paper, the transalkylation reaction of toluene and 1,3,5-trimethylbenzene over modified zeolites based on Hβ had been investigated. The product selectivity of conversion of toluene and l,3,5-trimethylbenzene, to para-xylene on zeolite Hβ modified by metals Al, Bi and nonmetal P was foumd to be dependent on the surface acid sites and acidity distribution of zeolites: 1) H-Beta zeolite modified by oxides of Al, Bi, showed higher reactivity than H-Beta 2) Lewis-acid sites are the active centers of transalkylation reaction over zeolite Beta.更多还原