The gas phase catalytic alkylation of phenol with methanol was investigated over a series of spinel-type cobalt chromite catalysts. The molar ratio of Co/Cr and the calcination temperature have considerable effect on the catalytic performance of the samples. Among them, the Co/Cr=0.8 sample calcined at 723 K shows the highest activity (97.3% phenol conversion) with a total 94.8% ortho-selectivity to o-cresol and 2,6-xylenol at the reaction temperature of 693 K.
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Wang, Y., Zhou, Z., Jia, M. et al. Spinel-Type Cobalt Chromites as Novel and Highly Ortho-selective Catalysts for Phenol Alkylation. Catal Lett 104, 67–71 (2005). https://doi.org/10.1007/s10562-005-7438-x
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DOI: https://doi.org/10.1007/s10562-005-7438-x