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Shape-Selective Alkylation of Toluene with Dimethyl Carbonate into p-Xylene Over MgO/MCM-22 Prepared by a Novel Pre-impregnation Method

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Abstract

The MgO/MCM-22 catalysts were prepared by a novel pre-impregnation method and their catalytic performances for the shape-selective alkylation of toluene with dimethyl carbonate into p-Xylene were investigated. Characterization results indicated that the Brønsted acid sites on the external surface of MCM-22 were efficiently covered by the as synthesized MgO without influencing the inner acidic sites in the sinusoidal channels and the internal pore entrance was efficiently adjusted by the pre-impregnation method. The as prepared MgO/MCM-22(PI) catalysts exhibited comparative para-selectivity but much higher toluene conversion than those over MgO-modified MCM-22 catalysts by general impregnation. The 10% MgO/MCM-22(PI) catalyst exhibited the best shape-selective performance for the highly uniform dispersion of the as synthesized MgO.

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Acknowledgements

Financial support by the National Natural Science Foundation of China (21878027), Advanced Catalysis and Green Manufacturing Collaborative Innovation Center (ACGM2020-08), National Science Foundation of the Jiangsu Higher Education Institutions (18KJA150001 and 19KJA430003) and Jiangsu Province Key Laboratory of Fine Petrochemical Engineering (KF2101) is gratefully acknowledged.

Funding

Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, Changzhou University, ACGM2020-08, Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, KF2101, National Science Foundation of the Jiangsu Higher Education Institutions, 18KJA150001, 19KJA430003, National Natural Science Foundation of China, 21878027

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Authors and Affiliations

  1. Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, 213164, China

    Zhe Wen, Fei Cao, Jia-Bao Liu & Bing Xue

  2. Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou, 213164, China

    Zhe Wen

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  1. Zhe Wen
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  2. Fei Cao
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  3. Jia-Bao Liu
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  4. Bing Xue
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Correspondence to Zhe Wen or Bing Xue.

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Wen, Z., Cao, F., Liu, JB. et al. Shape-Selective Alkylation of Toluene with Dimethyl Carbonate into p-Xylene Over MgO/MCM-22 Prepared by a Novel Pre-impregnation Method. Catal Lett 154, 170–180 (2024). https://doi.org/10.1007/s10562-023-04289-z

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