Solid superacid catalyst S_2O_8~(2―)/ZrO_2-TiO_2-Al_2O_3 for preparation of levulinic acid

With sucrose as raw meterial,levulinic acid was preparated by using S2O82―/ZrO2-Ti2O3-Al2O3 as solid superacid catalyst.The effects of technological condition,such as catalyst calcination temperature,catalyst dosage,sucrose concentration,reaction temperature,reaction time on the relative yield of levulinic acid were investigated and orthogonal experiment was used to determine the optimum conditions.The result showed that the highest relative yield of levulinic acid was 72.28% under the optimal conditions of catalyst calcination temperature 550 ℃,sucrose concentration 15 g/L,catalyst dosage 15% of the sucrose amount added to the reaction,reaction temperature 200 ℃,reaction time 60 min.