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Alkylation of catechol with methanol to guaiacol over sulphate-modified zirconia solid acid catalysts

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Abstract

A series of sulphate-promoted ZrO2 solid acid catalysts with different contents of SO4 2− were calcined at 450°C in air for 4 h and tested for the liquid-phase alkylation of catechol to guaiacol in a fixed-bed down-flow reactor. The 5 wt.% SO4 2− on ZrO2 showed the best conversion (82%) and selectivity for guaiacol (84%) at 200°C and 1 bar pressure. A smooth correlation was observed between the catalytical activity and surface acidity of sulphated zirconia. Based on our results, a surface mechanism is proposed.

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Authors and Affiliations

  1. Catalysis and Physical Chemistry Division, India Institute of Chemical Technology, Hyderabad, 500007, India

    Venkataraman Vishwanathan, Gajula Balakrishna, Balraj Rajesh & Venkatreddy Jayasri

  2. Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand Johannesburg, Johannesburg, WITS 2050, South Africa

    Lucky Sikhwivhilu & Neil J. Coville

Authors
  1. Venkataraman Vishwanathan
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  2. Gajula Balakrishna
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  3. Balraj Rajesh
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  4. Venkatreddy Jayasri
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  5. Lucky Sikhwivhilu
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  6. Neil J. Coville
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Correspondence to Venkataraman Vishwanathan.

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Vishwanathan, V., Balakrishna, G., Rajesh, B. et al. Alkylation of catechol with methanol to guaiacol over sulphate-modified zirconia solid acid catalysts. React Kinet Catal Lett 92, 311–317 (2007). https://doi.org/10.1007/s11144-007-5163-8

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  • DOI: https://doi.org/10.1007/s11144-007-5163-8

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