固体超强酸催化剂S_2O_8^(2-)/ZrO_2-TiO_2-Al_2O_3制备乙酰丙酸

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

研制了固体超强酸催化剂S2O82―/ZrO2-TiO2-Al2O3,并以蔗糖为原料,催化水解法制备乙酰丙酸。通过单变量法考察了催化剂的焙烧温度、催化剂的投加量、蔗糖浓度、反应温度、反应时间等对乙酰丙酸相对收率的影响,并采用了正交实验来确定最佳工艺条件。研究结果表明,当催化剂的焙烧温度为550℃、蔗糖浓度为15 g/L、催化剂用量为蔗糖质量的15%、反应温度为200℃、反应时间为60 min时,乙酰丙酸的相对收率最大,达到72.28%。

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.