Superacid ZrO2–SiO2–SnO2 Mixed Oxide: Synthesis and Study

Superacid ternary ZrO2 SiO2 SnO2 oxide has been synthesized by the sol-gel method with a different atomic ratio Zr:Si:Sn. The highest strength of acid sites observed in ranges 20 ≤ Zr4+ 29, 60 Si4+ 67, 11 Sn4+ at.%. According to XPS spectra and 119Sn, 29Si MAS NMR partial shift electron density from zirconium silicon ions was resulting formation superacid Lewis sites. It shown that Zr29Si60Sn11 mixed efficiently catalyzes acylation toluene acetic anhydride at 423 K flow reactor 45% conversion 100% selectivity towards p-methylacetophenone.