Abstract：Zr-MCM-41 mesoporous molecular sieves with different Si/Zr molar ratios were hydrothermally synthesized and characterized by XRD, TEM and N2 physical adsorption. SO2-4/Zr-MCM-41 catalysts were prepared by wet impregnation method with H2SO4 solution. The results reveal that the synthesized MCM-41 samples show typical mesoporous structure, and the specific surface area and pore volume of samples decrease gradually with the decrease of Si/Zr molar ratio.When the Si/Zr molar ratio equals to 5, the mesoporous framework of sample is disorder without any hexagonal mesoporous structure. The SO2-4/Zr-MCM-41 catalyst exhibits high catalytic activity for alkylation reaction of phenol with increased 4-tert-butyl-phenol selectivity and decreased 2,4di-t-butyl phenol selectivity for enhanced temperature. Under optimum catalytic condition with tertbutyl alcohol to phenol molar ratio of 2, WHSV of 2 h-1 and reaction time of 2 h at 140 ℃, phenol conversion can reach 82.9%.
2012, Vol. 33 
