固体超强酸催化微晶纤维素水解制备乙酰丙酸
河南省科学院能源研究所有限公司 河南省生物质能源重点实验室 河南省科学院
2015-03-06
微晶纤维素 固体酸 乙酰丙酸
乙酰丙酸是一种重要的平台化合物,其应用十分广泛.研究发现,多种固体酸可以催化微晶纤维素合成乙酰丙酸,其中固体超强酸SO42-/Ti O2催化效果最佳,通过BET比表面积,XRD,NH3-TPD和元素分析等手段对催化剂性质进行了表征.该研究以SO42-/Ti O2为催化剂,考察了反应时间、反应温度、催化剂用量对乙酰丙酸收率的影响,并使用GC对反应产物进行了分析.在反应温度为210℃,反应时间为1h,SO42-/Ti O2催化剂的用量为纤维素质量的2.5%时,乙酰丙酸的收率为68.5%.%Levulinica acid had been recognized as a kind of important platform chemicals and had a wide range of applications.The study found that many solid acids were efficient catalysts for the conversion of microcrystalline cellulose to levulinic acid, SO42-/TiO2 was the most effective catalyst for this reaction.All catalysts were characterized by BET surface area, XRD, NH3-TPD and elemental analysis,etc.With SO42-/TiO2 as the catalyst, the effect of reaction time,reaction temperature and the amount of catalyst on the yield of levulinic acid were studied and the reaction products were analyzed by GC.The yield of levulinic acid was 68.5% at 210 ℃ for 1h with catalyst dosage of 2.5%.
