Kinetics Study of the Transesterification Reaction of Methyl Acetate with Isooctyl Alcohol Catalyzed by Dicationic Heteropolyanion-Based Ionic Liquids

In this work, dicationic acidic heteropolyanion-based ionic liquids were synthesized, and used in transesterification reaction of methyl acetate with isooctyl alcohol for producing isooctyl acetate. Compared with H 2 SO 4 , and H 3 PW 12 O 40 , [Bis-BsImB][HPW 12 O 40 ] and [Bis-Bs-DABCO][HPW 12 O 40 ] shown excellent catalytic performance. The reaction kinetics and chemical equilibrium of the transesterification catalyzed by [Bis-BsImB][HPW 12 O 40 ] and [Bis-Bs-DABCO][HPW 12 O 40 ] were investigated. The effects of reaction temperature, initial reactant molar ratio, and catalyst concentration on the kinetics were studied in detail. The kinetic data were successfully correlated by a pseudohomogeneous model in the temperature range of 328.15 − 343.15 K. The simulation values obtained by the kinetic model were in good agreement with the experimental data. Moreover, [Bis-BsImB][HPW 12 O 40 ] and [Bis-Bs-DABCO][HPW 12 O 40 ] could be easily recovered and reused five times without any obvious decrease in catalytic activity. Graphical Abstract