摘要
以稻草为原料,高压酸水解法制备乙酰丙酸,采用气相色谱法测定水解液中乙酰丙酸的含量,考察了反应温度、反应时间、固液比和硫酸质量分数对乙酰丙酸得率的影响,通过单因素试验确定了最佳水解条件。结果表明,在高压1.6 MPa条件下,反应温度170℃,反应时间60 min,固液比1∶10,硫酸的质量分数为5%时,所制得乙酰丙酸得率为24.35%,此条件下水解残渣中纤维素和多戊糖均已完全反应。
Levulinic acid was prepared by the method of high-pressure acid hydrolysis of rice straw, The purity of levulinic acid was determined by gas chromatography. The influences of the reaction temperature, reaction time, solid-liquid ratio and acid concentration on the yield of levulinic acid were investigated. The single factor experimental results showed that when the temperature was 170 ℃, the solid- liquid ratio was 1 ： 10 and the acid concentration was 5 % by mass, the yield of levulinic acid was 24.35 %. At this optimal hydrolysis condition, no cellulose or pentosan was detected in the hydrolyzed residue.
出处
《生物质化学工程》
CAS
2007年第4期13-16,共4页
Biomass Chemical Engineering
基金
黑龙江省重点项目(GB05B601-02)
关键词
乙酰丙酸
稻草
酸水解
levulinic acid
rice straw
acid hydrolysis
