Alkylation of o-Xylene with Styrene over Modified Mordenite for Environmentally Friendly Synthesis of PXE  

作　　者：Kong Jie Sheng Xiaoli Zhou Yuming Zhou Shijian Zhang Zewu 

机构地区：[1]School of Chemistry and Chemical Engineering, Southeast University

出　　处：《China Petroleum Processing & Petrochemical Technology》2014年第1期52-59,共8页中国炼油与石油化工（英文版）

基　　金：the financial supports of the National Natural Science Foundation of China (Grant No. 21306023, 21376051, 21106017 and 51077013);the Fund Project for Transformation of Scientific and Technological Achievements of Jiangsu Province (Grant No. BA2011086);the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20100092120047);the Key Program for the Scientific Research Guiding Fund of Basic Scientific Research Operation Expenditure of Southeast University (Grant No. 3207043101);the Instrumental Analysis Fund of Southeast University

摘　　要：Effects of hydrochloride acid dealumination of mordenite(MOR) catalysts for the synthesis of 1-phenyl-1-xylyl ethane(PXE) were investigated. The structure and acidity of catalysts were characterized by XRD, BET, XRF, FT-IR, 27Al NMR and NH3-TPD techniques. The catalytic performance of the acid-treated MOR zeolites was studied through using the alkylation of o-xylene with styrene. The test results showed that the strength of remaining Br?nsted acid sites increased despite the reduction of total number of acid sites after dealumination, and the micropores of HMOR were slightly enlarged coupled with the formation of secondary mesopores. Additionally, the modified HMOR zeolites showed longer catalyst life with the styrene conversion rate retained. Among the catalysts employed in this study, the modified mordenite that was dealuminated by HCl(2 mol/L) could be used repeatedly without significant loss of activity and selectivity during six catalytic runs, which have been ascribed to its specific acidity and structural properties.Effects of hydrochloride acid dealumination of mordenite （MOR） catalysts for the synthesis of 1-phenyl-1-xylylethane （PXE） were investigated. The structure and acidity of catalysts were characterized by XRD, BET, XRF, FT-IR, 27AlNMR and NH3-TPD techniques. The catalytic performance of the acid-treated MOR zeolites was studied through usingthe alkylation of o-xylene with styrene. The test results showed that the strength of remaining Bronsted acid sites increaseddespite the reduction of total number of acid sites after dealumination, and the micropores of HMOR were slightly enlargedcoupled with the formation of secondary mesopores. Additionally, the modified HMOR zeolites showed longer catalystlife with the styrene conversion rate retained. Among the catalysts employed in this study, the modified mordenite that wasdealuminated by HCl （2 mol/L） could be used repeatedly without significant loss of activity and selectivity during six catalyticruns, which have been ascribed to its specific acidity and structural properties.

关 键 词：MORDENITE DEALUMINATION 1-phenyl-1-xylyl ethane ALKYLATION 

分 类 号：TQ426[化学工程]