改性Hβ沸石上对甲酚与异丁烯的烷基化反应  

Alkylation of p-Cresol with Isobutylene Over Modified β Zeolite

作　　者：李文凤[1] 王茜[1] 董燕飞[1] 齐欣[1] 

机构地区：[1]天津大学理学院,天津300072

出　　处：《化学工业与工程》2007年第3期254-257,共4页Chemical Industry and Engineering

摘　　要：用等离子发射光谱(ICP)、X射线衍射分析(XRD)和NH3程序升温脱附(NH3-TPD)表征了改性Hβ沸石的物理化学性质,考察了Mn和Ce改性Hβ沸石对对甲酚-异丁烯烷基化反应的催化性能,并探讨了Mn改性Hβ沸石催化下温度、原料摩尔比和空速对烷基化反应的影响。研究发现,用Mn改性Hβ沸石的催化活性和产物选择性有所升高,且最佳反应条件为反应温度为125℃,n(异丁烯)∶n(对甲酚)=3∶1,空速为2 h-1。Mn改性Hβ沸石是对甲酚-异丁烯烷基化反应极有开发前景的催化剂。The physical chemistry properties of catalysts were characterized by ICP, XRD and NH3-TPD, alkylation of p-cresol with isobutylene over β zeolite modified by Mn and Ce was carried out and the catalytic activity of the zeolite was investigated. And the influences of reaction temperature, molar ratio of isobutylene/ p-cresol and WHSV were analyzed. The result indicated that the catalytic activity of the β zeolite modified by Mn and the selectivity of 2-tert-butyl-4-methy-phenol are improved, the optimized condition are reaction temperature of 125 ℃, molar ratio of isobutylene/p-cresol of 3 ,WHSV of 2 h-l. β zeolite modified by Mn is a promising catalyst for alkylation of p-cresol with isobutylene.

关 键 词：Β沸石 对甲酚 异丁烯 烷基化 2-叔丁基对甲酚 

分 类 号：TQ032.41[化学工程]