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Catalytic conversion of 2,5-dichlorotoluene over Hβ zeolite, Ag/Hβ and Cu/Hβ catalysts in N2 or H2 atmosphere

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Abstract

2,6-Dichlorotoluene (2,6-DCT), 2,4-dichlorotoluene (2,4-DCT), dichlorobenzenes (DCB), and dichloroxylene (DCX) were selectively synthesized through the catalytic conversion of 2,5-dichlorotoluene (2,5-DCT) over Hβ (SiO2/Al2O3 = 25) zeolite, Ag/Hβ, and Cu/Hβ catalysts in a N2 or H2 atmosphere. When Hβ zeolite was used as the catalyst at 310−350 °C in a N2 atmosphere, DCB, 2,6-DCT, 2,4-DCT, and DCX with the selectivities of ca. 28, 15, 17, and 22% were formed as the main products. When the Ag/Hβ catalysts with high Brønsted acid amount catalyzed the conversion of 2,5-DCT, 2,4-DCT with the selectivities of 71.9–83.9% was formed at 310 and 330 °C. The catalytic activities over the Cu/Hβ catalysts were similar to that over the Hβ catalyst. In a H2 atmosphere, the Ag2/Hβ and Cu10/Hβ catalysts favored the 2,5-DCT hydrogenation to DCB with the selectivities of around 40 and 58%, respectively. The acidity and metal type of the catalyst played important roles in the catalytic conversion of 2,5-DCT to chlorinated aromatics.

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Acknowledgements

This work was financially supported by National Natural Science Foundation of China (21506078 and 21506082), China Postdoctoral Science Foundation (2016M591786 and 2016M601739), and Jiangsu Planned Projects for Postdoctoral Research Funds (1601084B).

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  1. Faculty of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China

    Chu Zhai, Hengbo Yin, Jitai Li, Aili Wang, Lingqin Shen & Jing Hu

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  1. Chu Zhai
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  2. Hengbo Yin
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Correspondence to Hengbo Yin.

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Zhai, C., Yin, H., Li, J. et al. Catalytic conversion of 2,5-dichlorotoluene over Hβ zeolite, Ag/Hβ and Cu/Hβ catalysts in N2 or H2 atmosphere. Reac Kinet Mech Cat 122, 369–384 (2017). https://doi.org/10.1007/s11144-017-1209-8

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