Synthesis of novel Bronsted-Lewis acidic ionic liquid catalysts and their catalytic activities in acetalization

Ionic liquid catalysts which combine the characters of the Bronsted-Lewis solid acids and the ionic liquid are prepared. The obtained composite materials were well characterized by FT-IR, TGA, H-1 NMR, C-13 NMR and investigated their performance for acetalization. The acid strength was determined by the Hammett method combined with UV-vis spectroscopy. Response surface methodology (RSM) was applied to optimize the synthesis of benzaldehyde glycol acetal and the effects of various reaction conditions. A Box-Behnken experimental Design (BBD) was employed to search for the optimal yield. The kinetic study for the acetalization was performed under the optimum operating conditions. (C) 2015 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.