以稻草为原料，FeCl₃为催化剂，在甲苯/水双相溶剂体系中高压液化制备糠醛，所得糠醛废液中含有大量的5-羟甲基糠醛。以氯乙酸为催化剂，利用糠醛废液进一步催化制备乙酰丙酸。通过响应面法研究了催化剂质量分数、反应温度、反应时间对乙酰丙酸收率的影响，得出乙酰丙酸收率的二次回归方程。通过响应面分析及实验验证得到糠醛废液制备乙酰丙酸的最佳条件为：催化剂质量分数为10%，反应温度为198℃，反应时间为50 min，乙酰丙酸收率高达54.24%。

The furfural is prepared by high pressure liquefaction method,using straw as raw materials,ferric chloride as catalyst in toluene/water biphasic system.The remaining waste liquid contains a large amount of 5-hydroxymethyl furfural,and is used to make levulinic acid by using chloroacetic acid as catalyst.By means of response surface methodology,the influences of catalyst concentration,reaction temperature and reaction time on the yield of levulinic acid are studied,and the quadratic regression equation is therefore obtained.According to response surface methodology analysis and experimental check,the maximum levulinic acid yield of 54.24% is achieved under optimal conditions that reaction temperature is 198℃,reaction time is 50 min and catalyst concentration is 10%.

陶鹏飞(1993-),男,硕士研究生,主要从事生物质研究,dddyyttpf@126.com