“…Therefore, the replacement of liquid acid catalysts in Friedel-Crafts reactions with heterogeneous catalysts is a promising strategy in green chemistry. Many types of solid catalysts have been studied such as Sb supporting K10 [1], Si-MCM-41-supported Ga 2 O 3 and In 2 O 3 [2], solid super acids based on sul-fated ZrO 2 [3], Fe (OTf) 3 [4], zinc-modified MCM-22 [5], FeCl 3 , MnCl 2 , CoCl 2 , NiCl 2 , CuCl 2 , ZnCl 2 supported on acidic alumina [6], Hf/SBA-15 [7], K 2 FeZrP 3 O 12 [8], FeY zeolite [9], mesoporous AlSBA-15 [10], ZSM-5 zeolites [11], silica-immobilized FeCl 3 [12], H-Beta zeolite [13], mesoporous mordenite [14], niobium-containing zeolites [15], and ion-exchanged clays [16]. Cseri et al [16] showed that the mechanism of benzylation of benzene with benzyl chloride on solid catalysts differs from the classical acid mechanism.…”