无模板ZSM-5改性及其催化甲苯-乙醇烷基化制备对甲乙苯的研究  

Modification of ZSM-5 zeolite without template and its catalytic performance in alkylation of toluene and ethanol to p-methylethylbenzene

作　　者：徐耀东 汤庆奎 朱鹏 陈景润 张伟[2] 张雄福[1] XU Yao-dong;TANG Qing-kui;ZHU Peng;CHEN Jing-run;ZHANG Wei;ZHANG Xiong-fu(State Key Laboratory of Fine Chemicals,School of Chemical Engineering,Dalian University of Technology,Dalian 116024,China;Xi'an Clean Energy(Chemical)Research Institute of ACS Dalian Institute of Chemical Physics,Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Xi'an 710075,China)

机构地区：[1]大连理工大学化工学院,精细化工国家重点实验室,辽宁大连116024 [2]陕西延长石油(集团)有限责任公司大连化物所西安洁净能源(化工)研究院,陕西西安710075

出　　处：《现代化工》2022年第3期169-173,177,共6页Modern Chemical Industry

基　　金：陕西延长石油(集团)有限责任公司大连化物所西安洁净能源(化工)研究院资助项目(JJ0521SKF0001)。

摘　　要：选用无模板法合成的ZSM-5为催化剂母体,对其进行浸渍法改性,研究其在固定床上催化甲苯-乙醇烷基化合成对甲乙苯的性能。考察了Si、P、Mg单组分改性无模板ZSM-5所得催化剂的反应性能,研究了Si、P、Mg多组分复合改性所得催化剂的烷基化反应性能,并结合相关表征进行了分析讨论。结果表明,在甲苯-乙醇烷基化反应中,采用的无模板合成的ZSM-5催化剂具有与商业有模板合成的ZSM-5催化剂相当的反应性能;Si、P、Mg多组分联合改性的催化剂可以获得高对位选择性甲乙苯产品,8Si-9P-6Mg/HZSM-5催化剂具有很好地择形催化效果,其乙醇转化率为100%,甲苯转化率可达9%以上,对甲乙苯选择性高达99%以上。In order to prepare p-ethylbenzene via alkylation between toluene and ethanol, ZSM-5 synthesized by a template-free method is selected as catalyst parent to be modified by impregnation method.The modified ZSM-5 catalysts are applied in the fixed-bed alkylation of toluene with ethanol to p-ethylbenzene to evaluate their catalytic properties.The reaction properties of Si, P and Mg modified template-free ZSM-5 catalysts are investigated.The properties of Si, P and Mg catalysts in alkylation are studied, and discussed in combination with related characterization.Results show that ZSM-5 catalyst synthesized without template exhibits the same reaction performance in the alkylation of toluene with ethanol as that the commercial ZSM-5 one synthesized with template does.The Si, P and Mg modified template-free ZSM-5 catalysts can deliver high selectivity of para-methylethylbenzene.The 8 Si-9 P-6 Mg/HZSM-5 catalyst can show an excellent catalytic performance, over which the conversion rate of ethanol can reach 100%,the conversion of toluene exceeds 9% and the selectivity of p-methylethylbenzene exceeds 99%.

关 键 词：分子筛 ZSM-5 烷基化 催化剂改性 对甲乙苯 

分 类 号：O643[理学—物理化学]