Catalytic synthesis of ethyl acetate by novel pack-structured solid acids SO_4~(2-)/TiO_2-La~(3+)-Al_2O_3-Al

The aim of this study is to find a new packed catalyst for the catalytic distillation process of esterification.High-purity aluminium foils were used to form the Al_2O_3-Al carrier by anodic(oxidation). Loading with solid acid SO~(2-)_4/TiO_2-La~(3+),the specific packed catalyst SO~(2-)_4/TiO_2-La~(3+)-Al_2O_3-Al was prepared.It was then used as a catalyst to synthesize ethyl acetate.The optimum(synthetic) conditions have been obtained as: the molar ratio of the alcohol and acid was 1∶8; the mass of the catalyst was 2.0 g;and the reaction time was 6 h at reflux temperature.The yield of the ester could reach 50.40%,and the selectivity for the esterification was 100%.The catalyst can be reused directly for 5 times.