Alkylation Of Hydroquinone With Tert-Butyl Alcohol Over Bis[(Perfluoroalkyl)Sulfonyl]Imides Supported On Mcm-41

Bis[(perfluoroalkyl)sulfonyl]imides [HN(SO2Rf)(2), and R-f represents the perfluorinated alkyl group] supported on MCM-41 were synthesized and characterized by XRD, MR, SEM, TGA and N-2-adsorption techniques. The supported catalysts, HN(SO2Rf)(2)/MCM-41, were used as the catalysts for the tert-butylation of hydroquinone (HQ) with tert-butyl alcohol (TBA) in the liquid phase. A high yield (52.0%) of 2-tert-butyl hydroquinone (TBHQ) could be obtained in the presence of 5 mol% HN(SO2C4F9)(2)/MCM-41 under the optimized reaction conditions and the heterogeneous catalyst could be recycled at least 6 times without substantial loss of activity.