Chem. J. Chinese Universities ›› 2009, Vol. 30 ›› Issue (7): 1380.

• Articles • Previous Articles     Next Articles

Catalytic Performance of MCM-56 Molecular Sieve for Benzene Alkylation with Propylene

ZHANG Yu1,2, ZHAO Fei1, LI Zheng2, ZHAO Yin2, DENG Guang-Jin2, XING Hai-Jun3, JIA Ming-Jun3*, ZHANG Wen-Xiang3, WU Tong-Hao3   

  1. 1. Jilin Institute of Chemical Technology, Jilin 132022, China;
    2. Research Institute of China National Petrolume Jilin Corporation, Jilin 132021, China;
    3. College of Chemistry, Jilin University, Changchun 130012, China
  • Received:2008-09-19 Online:2009-07-10 Published:2009-07-10
  • Contact: JIA Ming-Jun. E-mail: jiamj@jlu.edu.cn
  • Supported by:

    吉林省科技厅科技发展计划项目(批准号: 20080310)、吉林省教育厅“十一五”科学技术研究项目(批准号: 吉教科合字[2008]第180号)和中国博士后科学基金面上资助.

Abstract:

MCM-56 zeolite was prepared by hydrothermally dynamic method. The as-made MCM-56 was detemplated by treating with a 30%H2O2 solution to obtain MCM-56(H2O2) zeolite instead of being treated with high-temperature calcination. The structure and acid properties of samples were studied by means of XRD, N2 adsorption-desorption, NH3-TPD and FTIR. The BET surface area of MCM-56(H2O2) can be improved significantly by hydrogen peroxide detemplation. A higher external surface area of 301 cm2/g was obtained for HMCM-56(H2O2) compared with 134 cm2/g for HMCM-56(C). The amount of acid sites has been increased by hydrogen peroxide treatment, while the acid strength has not been modified. Both the HMCM-56 zeolite detemplated by H2O2 and by calcination were used in benzene alkylation with propylene in liquid phase. Under our operation condition, HMCM-56(H2O2) shows a relative high activity and selectivity to cumene than HMCM-56(C), especially under a relative low reaction temperature and benzene-to-propylene molar ratio.

Key words: MCM-56 molecular sieve; Alkylation; Cumene; Hydrogen peroxide

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