摘要
以超稳Y型分子筛(USY)为固体酸催化剂,考察其在乙醇中催化纤维素生成乙酰丙酸乙酯的工艺.分别探讨了液固比、反应温度、催化剂添加量、反应时间以及水的添加量对乙酰丙酸乙酯产率、乙醚和固体残渣质量的影响,同时考查了催化剂重复使用次数对乙酰丙酸乙酯产率的影响.结果表明:在液固比为15 mL/g、反应温度为220℃、催化剂质量分数为2.5%、反应时间为2 h和不加水的条件下,乙酰丙酸乙酯的摩尔产率达到14.95%,回收的USY经焙烧并重复利用5次后,依然具有良好的催化活性.
Ethyl levulinate was prepared by USY as solid acid catalyst from cellulose in ethanol. The effects of different parameters such as liquid-solid ratio, reaction temperature, catalyst dosage, reaction time and water dosage on ethyl levulinate yield and mass of diethyl ether and solid residue were also studied. And the influence of catalyst reuse cycle on ethyl levulinate yield was further investigated. Experimental results showed that the highest yield of ethyl levulinate was 14.95 mol% under the following conditions： liquid-solid ratio 15, reaction temperature 220 ℃ , catalyst dosage 2.5% , reaction time 2 h and water dosage 0. It was found that the recovered catalyst still remained high catalytic activity after being reused for five times.
出处
《郑州大学学报（工学版）》
CAS
北大核心
2014年第3期22-26,共5页
Journal of Zhengzhou University（Engineering Science）
基金
国家自然科学基金资助项目(21176227)
河南省科学技术研究重点项目(14A530002)
