稀土金属氧化物改性Hβ分子筛催化甲苯叔丁基化反应的研究  

Alkylation of Toluene With Tert-butyl Alcohol Over Rare-earth Metal Oxide Modified Hβ Zeolite

作　　者：黄昕蕊 王园园[1] 霍玲玉 蒲勇 严晨露 HUANG Xin-rui;WANG Yuan-yuan;HUO Ling-yu;PU Yong;YAN Chen-lu(College of Chemistry and Chemical Engineering,Northeast Petroleum University,Daqing 163318,China)

机构地区：[1]东北石油大学化学化工学院,大庆163318

出　　处：《当代化工》2021年第12期2865-2868,共4页Contemporary Chemical Industry

基　　金：黑龙江省杰出青年基金(JC2018002);黑龙江省大学生创新创业训练计划项目(项目编号:201910220062);东北石油大学青年科学基金项目(项目编号:2018QNL-26);东北石油大学人才引进科研启动费资助项目(项目编号:1305021821)。

摘　　要：以甲苯和叔丁醇烷基化为探针反应,考察了不同稀土金属氧化物(Ce_(2)O_(3)、La_(2)O_(3)、Pr_(2)O_(3)、Nd_(2)O_(3))改性Hβ分子筛的催化性能,并通过XRD、SEM、FT-IR、BET和NH_(3)-TPD等对改性分子筛进行表征.结果表明:稀土金属氧化物改性有利于对位选择性的提升.其中,以Ce_(2)O_(3)/Hβ分子筛的催化效果最佳,当Ce_(2)O_(3)负载量为3%,焙烧温度为450℃,催化剂用量为1.0 g,n(甲苯):n(叔丁醇)为1:3,溶剂为60 mL,反应温度180℃,反应时间为4 h,甲苯转化率为56.3%,PTBT的选择性为81.3%.A series of Hβzeolites modified by different rare-earth metal oxide(Ce_(2)O_(3),La_(2)O_(3),Pr_(2)O_(3)and Nd_(2)O_(3)) were prepared.The physicochemical characteristics of rare-earth metal oxide modified Hβwere characterized by XRD,SEM,FT-IR,BET and NH_(3)-TPD,etc.Their performances for butylation of toluene were also investigated.The results indicated that rare-earth metal oxide modification with suitable amount could greatly enhance the selectivity to PTBT.The toluene conversion of 56.3%,and PTBT selectivity to 81.3%could be obtained at the optimum conditions:3%Ce_(2)O_(3)/Hβamount of 1.0 g,n(toluene)∶n(TBA)ratio of 1∶3,cyclohexane amount of 60 mL,the reaction temperature of 180℃and the reaction time of 4 h.

关 键 词：甲苯 对叔丁基甲苯 稀土金属 改性 

分 类 号：TQ032[化学工程]