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Superacid ZrO_2:H_2SO_4 showed high activity in Friedel-Crafts benzoylation of benzeneand substituted benzenes such an chlorobenzene,toluene and 1,3,5-trimethylbenzene.Benzophenonesin 90-100% yields were obtained with catalytic amount of superacid ZrO_2:H_2SO_4.The calcinationtemperature greatly influenced the acid strength and activity of the superacid ZrO_2:H_2SO_4.Thesuperacid has both Lewis and Bronsted acid sites.The reversibility of Friedel-Crafts benzoylation andtransacylation were observed over the superacid.The used superacid could be readily regenerated andshowed identical benzoylation activity to toluene.
Superacid ZrO_2: H_2SO_4 showed high activity in Friedel-Crafts benzoylation of benzene and substituted benzenes such an chlorobenzene, toluene and 1,3,5-trimethylbenzene.Benzophenonesin 90-100% yields were obtained with catalytic amount of superacid ZrO_2: H_2SO_4.The calcinationtemperature greatly influenced the acid strength and activity of the superacid ZrO_2: H_2SO_4.Thesuperacid has both Lewis and Bronsted acid sites. The reversibility of Friedel-Crafts benzoylation and transient reactions were observed over the superacid. The used superacid could be readily regenerated and showed identical benzoylation activity to toluene.