Abstract： Composite molecular sieve was hydrothermal synthesized by using kaolin as raw material. The samples were characterized by XRD and N2 physical adsorption, and the effects of various factors on sample textural properties were also discussed. The catalytic performance of the composite molecular sieve was investigated by alkylation reaction of phenol and tert-butyl alcohol. The results show that the composite molecular sieve with mesoporous and microporous structure was successfully hydrothermal synthesized for 24 h at 120 ℃with specific surface area of 628.9 m2·g-1 and average pore size of 2.73 nm. The composite molecular sieve exhibits good catalytic performance for the alkylation reaction of phenol and tertbutyl alcohol. The optimum molar ratio of tertbutanol to phenol is 2.0 at 140 ℃ with reaction time of 1 h and WHSV of 1.0 h-1, and the conversion of phenol is 62.2% with 4tertbutylphenol(4TBP) selectivity of 86.0%. The reaction temperature has obvious effect on the catalytic performance of composite molecular sieve. The increase of reaction temperature at low temperature range is favorable for the alkylation dominant, while the dealkylation is dominant at high temperature.
2012, Vol. 33 
