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Vapor phase aldol condensation of methyl acetate with formaldehyde was first studied over Al2O3 with different calcination temperatures and Al2O3-supported barium with different amounts of barium catalysts. The catalysts were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, N2 adsorption–desorption, the pyridine absorption performed via Fourier transform infrared spectroscope,...
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...
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