Tert-butylation of Toluene with Tert-butyl Alcohol over Realuminated H-mordenite Zeolite

›› 2009, Vol. 17 ›› Issue (2): 195-199.

Tert-butylation of Toluene with Tert-butyl Alcohol over Realuminated H-mordenite Zeolite

周志伟, 武文良, 王军, 曾崇余

College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China

收稿日期:2008-05-20 修回日期:2008-11-09 出版日期:2009-04-28 发布日期:2009-04-28
通讯作者: WU Wenliang,E-mail:wwl@njut.edu.cn
基金资助:
Supported by Major Basic Research Project of Natural Science Foundation of Jiangsu Province Colleges (07KJA53013)

Tert-butylation of Toluene with Tert-butyl Alcohol over Realuminated H-mordenite Zeolite

ZHOU Zhiwei, WU Wenliang, WANG Jun, ZENG Chongyu

College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China

Received:2008-05-20 Revised:2008-11-09 Online:2009-04-28 Published:2009-04-28
Supported by:
Supported by Major Basic Research Project of Natural Science Foundation of Jiangsu Province Colleges (07KJA53013)

摘要/Abstract

摘要： The realuminated H-mordenite catalysts(HM1-4) treated with different concentrations of NaOH and NaAlO₂ aqueous solutions were prepared,and characterized by inductively coupled plasma(ICP),X-ray diffraction(XRD),Fourier transform-infrared spectroscopy(FT-IR) and temperature-programmed desorption of ammonia,They are of lower Si/Al ratio and higher acid amount while keeping a high relative crystallinity.Their catalytic per-formances were evaluated with the liquid-phase tert-butylation of toluene with tert-butyl alcohol in a 100 ml stainless steel batch reactor equipped with a stirrer.HM₂ zeolite catalyst,obtained by treating HM in 0.1 mol·L^-1 NaOH followed by 0.05 mol·L^-1 NaAlO₂ aqueous solution,shows a higher catalytic activity because of its highest acid amount.For HM₂ catalyst the influences of reaction conditions on catalytic performance were investigated.The conversion of toluene is 50.3% and the selectivity of p-tert-butyltoluene is 74.7% at a temperature of 180℃,2 of molar ratio of tert-butyl alcohol to toluene,4h of reaction time and 0.2 of M(catalyst)/M(toluene).

关键词: realuminated H-mordenite, toluene, tert-butyl alcohol, p-tert-butyltoluene

Abstract: The realuminated H-mordenite catalysts(HM1-4) treated with different concentrations of NaOH and NaAlO₂ aqueous solutions were prepared,and characterized by inductively coupled plasma(ICP),X-ray diffraction(XRD),Fourier transform-infrared spectroscopy(FT-IR) and temperature-programmed desorption of ammonia,They are of lower Si/Al ratio and higher acid amount while keeping a high relative crystallinity.Their catalytic per-formances were evaluated with the liquid-phase tert-butylation of toluene with tert-butyl alcohol in a 100 ml stainless steel batch reactor equipped with a stirrer.HM₂ zeolite catalyst,obtained by treating HM in 0.1 mol·L^-1 NaOH followed by 0.05 mol·L^-1 NaAlO₂ aqueous solution,shows a higher catalytic activity because of its highest acid amount.For HM₂ catalyst the influences of reaction conditions on catalytic performance were investigated.The conversion of toluene is 50.3% and the selectivity of p-tert-butyltoluene is 74.7% at a temperature of 180℃,2 of molar ratio of tert-butyl alcohol to toluene,4h of reaction time and 0.2 of M(catalyst)/M(toluene).

Key words: realuminated H-mordenite, toluene, tert-butyl alcohol, p-tert-butyltoluene

周志伟, 武文良, 王军, 曾崇余. Tert-butylation of Toluene with Tert-butyl Alcohol over Realuminated H-mordenite Zeolite[J]. , 2009, 17(2): 195-199.

ZHOU Zhiwei, WU Wenliang, WANG Jun, ZENG Chongyu. Tert-butylation of Toluene with Tert-butyl Alcohol over Realuminated H-mordenite Zeolite[J]. , 2009, 17(2): 195-199.

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Tert-butylation of Toluene with Tert-butyl Alcohol over Realuminated H-mordenite Zeolite

Tert-butylation of Toluene with Tert-butyl Alcohol over Realuminated H-mordenite Zeolite

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