化工进展

• 能源加工与技术 • 上一篇    下一篇

高温液态水条件下木糖直接转化制备糠醛的工艺

孙啸寅1,党 杰2,华德润2,李盼盼2,吴玉龙2,杨明德2,李 春1,3   

  1. 1石河子大学化学化工学院,新疆 石河子 832003;2清华大学核能与新能源技术研究院,北京 100084; 3北京理工大学生命学院,北京 100081
  • 出版日期:2012-09-05 发布日期:2012-09-05

Research on direct conversion of xylose to furfural in high temperature water

SUN Xiaoyin1,DANG Jie2,HUA Derun2,LI Panpan2,WU Yulong2,YANG Mingde2,LI Chun1,3   

  1. 1 School of Chemistry and Chemical Engineering,Shihezi University,Shihezi 832003,Xinjiang,China; 2 Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 102201,China; 3 School of Life,Beijing Institute of Technology,Beijing 100081,China
  • Online:2012-09-05 Published:2012-09-05

摘要: 使用自制的高温高压反应釜,在高温液态水(HTW)的条件下对木糖直接转化制备糠醛的过程进行了研究。考察了HTW作为反应介质对木糖转化率和糠醛产率的影响,并与文献中所采用催化剂的催化效果进行了对比,探索了不同的溶剂对反应产物中糠醛的萃取效果。研究结果表明:HTW作为反应介质对木糖直接转化制备糠醛具有优良的反应性能,可以替代液体酸和固体酸作用于木糖制糠醛,在优化的工艺条件下,当木糖初始浓度为10%(g/g)、反应温度为200 ℃、反应时间为3 h时,糠醛的产率高达78%。此外,乙酸丁酯作为萃取剂对于糠醛的萃取具有良好的萃取效率。所得结果为工业化生产糠醛奠定了实验基础和理论依据。

关键词: 木糖, 糠醛, 高温液态水, 萃取, 直接转化

Abstract: Direct conversion of xylose into furfural in high-temperature water (HTW) was carried out in a self-made high-pressure reactor. The effect of HTW as the reaction medium on xylose conversion and furfural yield was investigated,and was compared with others catalyst used in the literature. The effects of different solvents on the extraction of furfural were studied. The result showed that HTW was a perfect catalyst medium,which could replace liquid acid and solid acid in the conversion of xylose into furfural. The optimal furfural yield of 78% was obtained at a reaction temperature of 200 ℃,a holding time of 3 h and initial xylose concentration of 10%. In addition,furfural could be well extracted by n-butyl acetate. Therefore,a novel approach to furfural production is presented,providing a basis as well as technical parameters for its commercialization.

Key words: xylose;furfural, high-temperature water (HTW);extraction, direct conversion

京ICP备12046843号-2;京公网安备 11010102001994号
版权所有 © 《化工进展》编辑部
地址:北京市东城区青年湖南街13号 邮编:100011
电子信箱:hgjz@cip.com.cn
本系统由北京玛格泰克科技发展有限公司设计开发 技术支持:support@magtech.com.cn