摘要
提出了一种高效的均相催化木糖制备糠醛的方法,探讨了水/二甲基亚砜(DMSO)均相体系中不同类型的无机盐对催化木糖制备糠醛的影响.结果表明,氯盐较硫酸盐和硝酸盐表现出较高的催化活性,其中以SnCl_4的催化效果最高.且它与LiCl复配时催化性能更高.当SnCl_4的摩尔分数为0.8时,催化效果最好,糠醛收率达56.9%.反应条件优化实验发现,当催化剂与木糖的摩尔比为0.5:1,固液比为1:20,水与DMSO体积比为5:5时,于130℃下反应6h,糠醛收率达63%.
An efficient homogeneous catalytic process was developed for the dehydration of xylose to furfural using inorganic salts as catalysts in a water/dimethyl sulfoxide （DMSO） system under mild condi-tion. The effects of the types of inorganic salts were compared. The results showed that chlorides had higher catalytic performance than other salts, and SnCl4 was the most effective chloride. The catalytic activity of paired SnCl4/LiCl catalysts was much higher than that of the single salt, and when the distribution coefficient （χSnCl4） was 0.8, the maximum furfural yield was 56.9%. The effects of the reaction conditions on the furfural yield were also investigated. The highest furfural yield, 63.0%, was achieved at 130 ＆#176;C for 6 h under the optimized reaction conditions.
出处
《催化学报》
SCIE
EI
CAS
CSCD
北大核心
2014年第5期741-747,共7页
基金
supported by Guangdong Natural Science Funds for Distinguished Young Scholar(S20120011250)
Program for New Century Excellent Talents in University(NCET-12-0194)
Foundation for the Author of National Excellent Doctoral Dissertation of China(201169)
Science and Technology Project of Guangdong Province(2011B050400015)
the Fundamental Research Funds for the Central Universities(2014ZG0003),South China University of Technology~~
关键词
木糖
糠醛
无机盐
氯化锡
氯化锂
二甲基亚砜
Xylose
Furfural
Inorganic salt
Stannic chloride
Lithium chloride
Dimethyl sulfoxide
