摘要
对木糖在甲苯/水二元溶剂体系中直接转化制备糠醛进行研究。考察了6种氯化物CrCl3·6H2O,AlCl3·6H2O,FeCl3,CuCl2·2H2O,CoCl2·6H2O,ZnCl2的催化效果,结果表明:选用的金属氯化物均具有一定的催化效果,其中CrCl3·6H2O的催化效果明显优于其他氯化物。以CrCl3·6H2O为催化剂,系统研究反应温度、反应时间、催化剂浓度、木糖质量分数、NaCl添加量对糠醛产率的影响,反应的最佳条件为:反应温度140℃、反应时间60 min,CrCl3·6H2O浓度0.1 mol/L,木糖及NaCl的质量分数分别为4%和15%。在该条件下,糠醛产率为52.55%。
The one-pot synthesis of furfural directly from xylose was studied in a biphasic system consisting of water and toluene as the organic phase.The catalytic efficiencies of the six metal chlorides （CrCl3 ·6H2 O,AlCl3 · 6H2 O,FeCl3 ,CuCl2 ·2H2 O,CoCl2 ·6H2 O,ZnCl2 ）were studied.The results show that these test chlorides can catalyze the conversion of xylose into furfural,and CrCl3 ·6H2 O is the optimum catalyst.CrCl3 ·6H2 O was used as the catalyst and the effects of reaction temperature,reaction time,catalyst concentration,the mass fraction of xylose and NaCl loading on the furfural yield were investigated and optimized.The optimum conditions are as follows：reaction temperature 140 ℃,reaction time 60 min,catalyst concentration 0.1 mol /L,the mass fractions of xylose and NaCl are 4% and 15%,respectively.Under these conditions,a furfural yield of 52.55% is achieved.
出处
《化学工程》
CAS
CSCD
北大核心
2014年第3期54-58,共5页
Chemical Engineering(China)
基金
安徽省教育厅基金重点资助项目(KJ2012A084)
关键词
木糖
糠醛
水解
三氯化铬
二元溶剂体系
xylose
furfural
hydrolysis reaction
chromium chloride
biphasic system
