中文摘要：

从可再生的生物质资源出发可以制备多种平台化合物，乙酰丙酸甲酯（methyl levulinate，MLA）是其中较重要的平台化合物之一，可广泛用作香料、溶剂、油品添加剂和合成中间体等。

英文摘要：

In order to explore the feasibility of one-pot preparation of methyl levulinate （MLA）from biomass catalyzed by dilute sulfuric acid in near-critical methanol,the kinetics of MLA production were investigated at initial glucose concentration of 10—30 mg·ml-1,temperature range from 160 ℃ to 190 ℃,and sulfuric acid concentration between 0.01—0.06 mol·L-1.The results show that reaction temperature has a significant effect on the selectivity of MLA and higher yield of MLA is obtained at higher temperature.With the first-order kinetic equations,the activation energies evaluated are 107.5 kJ·mol-1 and 68.4 kJ·mol-1,and the reaction orders to H＋ concentration are 0.981 and 0.953 for main and side alcoholysis reactions of glucose,respectively.The paper demonstrates that the one-pot process is promising for MLA production catalyzed by dilute sulfuric acid in near-critical methanol.