Solvent-free liquid phase tert-butylation of phenol over hierarchical ZSM-5 zeolites for the efficient production of 2,4-ditert-butylphenolElectronic Supplementary Information (ESI) available: experimental section, TEM, XRD, NH3-TPD data, hydrothermal test and selectivity data. See DOI: 10.1039/c2jm15692j

In this study we explored the important effect of Al doping level as a key factor on the pore structure and catalytic properties of hierarchical aluminosilicate zeolites. A distinctively high selectivity to bulky 2,4-DTBP was obtained as high as 84% in the tert -butylation of phenol. Hierarchical zeolites with varied Si/Al ratio were firstly investigated and explored in the solvent-free liquid phase tert -butylation of phenol.