双相体系中生物质基γ-戊内酯的绿色高效制备方法

项目名称： 双相体系中生物质基γ-戊内酯的绿色高效制备方法

项目编号： No.21306165

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 化学工业

项目作者： 傅杰

作者单位： 浙江大学

项目金额： 25万元

中文摘要： γ-valerolactone (GVL）是近年兴起的一个新生物质基平台化合物,由GVL出发可以制备多种液体燃料和化工产品。针对目前纤维素等上游原料一步法制备GVL技术中催化效率不高、酸催化剂难以回收等问题，本项目拟利用水-GVL双相体系的GVL相在反应过程中对水相中乙酰丙酸和甲酸的不断提取及GVL相中乙酰丙酸和甲酸的不断消耗，改变水相中反应的平衡以提高乙酰丙酸的产率，进而提高一步法制备GVL的最终产率和甲酸利用率，而且反应后的酸溶液可回收。并拟通过Lewis酸-Bronsted酸-疏水型金属负载催化剂催化体系的构建和评价，进一步提高GVL的产率和选择性，开展双相体系中纤维素及模型物质制备GVL的产物分布、反应途径、不同反应条件、动力学等方面的研究，揭示纤维素催化制备GVL的反应规律性和机理，进而建立双相体系中纤维素一步法制备GVL的新方法，推动GVL绿色、高效制备的工业化进程。

中文关键词： 纤维素；γ-戊内酯；乙酰丙酸；Ni基催化剂；离子液体

英文摘要： γ-valerolactone (GVL) is a new biomass based platform chemical which rises in recent years. From GVL, various liquid fuels and chemicals can be produced. Focusing on the problems such as low effiency and difficulty to recycle acid catalysts in the one-pot preparation of GVL from the upstream feedstock such as cellulose, this project will employ the extraction of levulinic acid and formic acid from the aqueous phase to the GVL phase during the reaction in water-GVL biphasic system, and the consumption of levulinic acid and formic acid in GVL phase, to improve the yield of levulinic acid in aqueous phase due to the change in aqueous reaction equilibrium, and then increase the overall yield of GVL and utilization rate of formic acid. Moreover, the acid solution can be recycled after reaction. With the establishment and evaluation of catalysis system of Lewis acid-Bronsted acid-hydrophobic metal supported catalyst, the yield and selectivity of GVL will be further improved. After that, the studies on product distribution, reaction pathway, different reaction conditions, reaction kinetics of GVL preparation from cellulose and model compounds in biphasic system will be carried out. The regularities and mechanisms of GVL catalytic preparation from cellulose will be revealed. A new approach of one-pot preparation of cell

英文关键词： cellulose；γ-valerolactone；levulinic acid；Ni-based catalysts；ionic liquids