Abstract: A series of S2O82-/ZrO2-SiO2 solid acid catalysts were prepared successfully by the method of precipitation-impregnation at different Si/Zr atom ratio, different roasting temperatures and different roasting times. Through the single factor test, we researched the effects of different Si/Zr atom ratio, roasting temperature and roasting time on the yield of Levulinic acid by sucrose and found that with the Si/Zr atom ratio improved from 3 to 5, the yield of LA was descend; with the roasting temperature improved from 500℃ to 600℃, the yield of LA was descend in the beginning, after 550℃ the yield was improved; with the roasting time improved from 2h to 4h, the yield of LA was improved in the beginning, after 3h the yield was descend. And solid superacid catalysts were characterized by means of IR and BET. The result indicate that:when the roasting temperature was 500℃, the roasting temperature was 4h, the Si/Zr atom ratio was 4, this kind of catalyst’s BET was the biggest, and its catalytic activity was the highest; this kind of catalyst for the hydrolysis of sucrose and bran, the yield of LA were 17.4% and 0.31%.
