Reaction kinetics for synthesis of sec-butyl alcohol catalyzed by acid-functionalized ionic liquid

The acid-functionalized ionic liquid ([HSO 3 Pmim]HSO 4 ) was synthesized by a two-step method. Nuclear magnetic resonance (NMR) and Fourier transform infrared spectroscopy (FT-IR) show that the synthesis method is feasible and high purity of ionic liquid can be obtained. Using [HSO 3 Pmim]HSO 4 as the catalyst, we studied the reaction kinetics of synthesizing sec -butyl alcohol from sec -butyl acetate and methanol by transesterification in a high-pressure batch reactor. The effects of temperature, initial molar ratio of methanol to ester, and catalyst concentration on the conversion of sec -butyl acetate were studied. Based on its possible reaction mechanism, a homogeneous kinetic model was established. The results show that the reaction heat Δ H is 10.94   ×   10 3   J·mol −   1 , so the reaction is an endothermic reaction. The activation energies E a   + and E a   − are 60.38   ×   10 3 and 49.44   ×   10 3   J·mol −   1 , respectively.