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林产化学与工业

林产化学与工业 ›› 2013, Vol. 33 ›› Issue (5): 77-82.doi: 10.3969/j.issn.0253-2417.2013.05.015

• 1研究报告 • 上一篇    下一篇

常压下硫酸催化玉米芯制备糠醛的实验研究

张晔1, 陈明强1,2, 李峰2, 杨忠连1,2, 王君2, 刘少敏1   

  1. 1. 安徽理工大学 地球与环境学院, 安徽 淮南 232001;2. 安徽理工大学 化学工程学院, 安徽 淮南 232001
  • 收稿日期:2012-12-11 修回日期:1900-01-01 出版日期:2013-10-30 发布日期:2013-10-30
  • 通讯作者: 陈明强,博士生导师,研究领域为生物质能源转化;E-mail:mqchen@aust.edu.cn。

Conversion of Corncob into Furfural with Sulfuric Acid at Atmospheric Pressure

ZHANG Ye1, CHEN Ming-qiang1,2, LI Feng2, YANG Zhong-lian1,2, WANG Jun2, LIU Shao-min1   

  1. 1. School of Earth Science and Environmental Engineering, Anhui University of Science and Technology, Huainan 232001, China;2. School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, China
  • Received:2012-12-11 Revised:1900-01-01 Online:2013-10-30 Published:2013-10-30

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摘要： 常压条件下,以玉米芯为原料,硫酸为催化剂,甲苯为萃取剂,分别考察了加热温度、反应时间、酸质量分数及液固比对糠醛得率的影响。糠醛得率随着加热温度及反应时间的增加而提高,当加热温度为 160℃,反应时间为 90 min 时,糠醛得率达到极大值,8.43%。糠醛得率随着硫酸质量分数增加呈现先升高后降低的变化趋势。当硫酸质量分数为 25% 时,糠醛得率最大。继续提高硫酸质量分数,糠醛得率降低,当硫酸质量分数为 35% 时,糠醛得率在 90 min 时仅为 0.62%。结果表明 ：在实验条件范围内,玉米芯水解制备糠醛的理想条件为：反应温度 160℃、反应时间 60 min、酸质量分数 25%、液固比为10:1(mL:g)。在该反应条件下,糠醛得率为 8.15%。

关键词: 糠醛, 硫酸, 酸催化, 溶剂萃取, 常压条件

Abstract: In this paper, corncob was used as feedstock and toluene was selected as extraction solvent. The objective of this work was to study the furfural yields by hydrolysis of corncob with different sulfuric acid concentrations at various liquid/solid ratios under the atmospheric pressure. Four important parameters consisting of heating temperature (140-190℃), reaction time (20-120 min), mass fraction of sulfuric acid (5%-35%, mass fraction) and liquid/solid ratio were evaluated. The conversions of corncob and furfural yield were found to increase significantly with the heating temperature and reaction time increasing. When the heating temperature was 160℃,the maximum furfural yield, i.e. 8.43% was obtained within 90 min. The concentration of sulfuric acid was found to affect the furfural yield. The optimal furfural yield was observed when the sulfuric acid concentration was 25%. After this, as the sulfuric acid concentration increased, the furfural production decreased. When the concentration was up to 35%, the furfural yield was only 0.62% at 90min. By analysis of experimental results, the optimal parameters of furfural prepared as follows: the optimum heating temperature 160℃, the appropriate reaction time 60 min, the best acid concentration 25% and the best ratio of liquid to solid 10. Under these conditions, a furfural yield of 8.15% was obtained.

Key words: furfural, sulfuric acid, acid-catalyzed hydrolysis, solvent extraction, atmospheric pressure

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