中国炼油与石油化工 ›› 2014, Vol. 16 ›› Issue (01): 52-59.

• Catalyst Research • 上一篇    下一篇

以改性丝光沸石为催化剂合成PXE

孔杰1,盛晓莉2,周钰明1,周诗健2,张泽武1   

  1. 1. 东南大学化学化工学院
    2. 东南大学
  • 收稿日期:2013-10-24 修回日期:2013-11-20 出版日期:2014-03-30 发布日期:2014-03-30
  • 通讯作者: 周钰明 E-mail:ymzhou@seu.edu.cn
  • 基金资助:
    江苏省科技成就基金;国家自然基金

Alkylation of o-xylene with styrene over modified mordenite for environmental friendly synthesis of PXE

  • Received:2013-10-24 Revised:2013-11-20 Online:2014-03-30 Published:2014-03-30
  • Contact: Yuming Zhou E-mail:ymzhou@seu.edu.cn
  • Supported by:
    Fund Project for Transformation of Scientific and Technological Achievements of Jiangsu Province of China;National Natural Science Foundation of China

摘要: Effects of hydrochloride acid dealumination of mordenite catalysts on the synthesis of 1-phenyl-1-xylyl ethane (PXE) were investigated. The structure and acidities of catalysts were characterized by techniques of XRD, BET, XRF, FT-IR, 27Al NMR and NH3-TPD. The catalytic performances of the acid-treated MOR zeolites were discussed using the alkylation of o-xylene and styrene. The results showed that the strength of remaining Br?nsted acid sites increased although the total number of acid sites decreased after dealumination, and the micropores of HMOR slightly enlarged followed by the formation of secondary mesopores. Additionally, the modified HMOR zeolites showed longer catalyst life with retaining styrene conversion. Among the catalysts employed in this study, the modified mordenite that was dealuminated by HCl (2 M) could be used repeatedly without significantly loss of activity and selectivity during six catalytic runs, which have been related to its acidity and structural properties.

关键词: Mordenite, Dealumination, Catalytic activity, Reusability