文献类型：期刊文献

中文题名：Hβ负载磷钨酸催化剂上甲苯和均三甲苯烷基转移与歧化反应

英文题名：Transalkylation and Disproportionation between Methylbenzene and 1,3,5-Trimethylbenzene Over the Hβ Zeolite Supported Phosphotungstic Acid Catalyst

作者：王昕[1];翁惠新[1];孔德金[2];施力[1]

机构：[1]华东理工大学化工学院,上海200237;[2]上海石油化工研究院,上海201208

年份：2009

卷号：35

期号：6

起止页码：814

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：磷钨酸;歧化;烷基转移;Hβ分子筛

外文关键词：phosphotungstic acid disproportionation tansalkylation Hβ zeolite

摘要：讨论了甲苯和均三甲苯烷基转移与歧化反应制备二甲苯过程中Hβ负载磷钨酸系列催化剂的催化性能。结果表明:反应主要为甲苯烷基转移和均三甲苯歧化反应;随着催化剂中Hβ上磷钨酸负载量的增加,均三甲苯转化率、二甲苯选择性和收率均先增加后减少,当磷钨酸质量分数为10%时,总酸量达到最大,总转化率、二甲苯收率及二甲苯选择性也分别达到最大值,即77.0%、38.5%和51.1%。催化剂XRD图谱显示负载的磷钨酸高度分散于Hβ分子筛表面,对载体晶体结构无影响。
The effect of phosphotungstic acid（PW） supported by Hβ on the transalkylation and disproportionation of methylbenzene and 1,3,5-trimethylbenzene to produce dimethylbenzene was studied.The results indicate that the transalkylation of methylbenzene and the disproportionation of 1,3,5-trimethylbenzene are the main reactions.With increasing the PW content loaded on the Hβ catalyst,the conversion of 1,3,5-trimethylbenzene,the selectivity and yield of dimethylbenzene increase at first and then decrease.When the mass fraction of Hβ-supported PW is 10%,the total activity reaches maximum,and the overall feed conversion,the yield and the selectivity of dimethylbenzene are 77.0%,38.5% and 51.1%,respectively.XRD patterns of the catalysts indicate that the PWs are highly dispersed on the surface of Hβ-support and have no effect on the crystal structure of support.