离子液体中生物质基木糖制备糠醛的研究

Efficient Conversion of Biomass-Derived Xylose into Furfural in Ionic Liquids

在离子液体反应体系中,催化生物质基木糖脱水制备糠醛.考察了反应温度、反应时间、催化剂用量、木糖浓度、含水量、反应体系重复使用次数等因素对反应的影响.结果表明:当离子液体1-丁基-3-甲基咪唑氯盐([BMIM]Cl)用量为2g、催化剂AlCl3·6H2O用量为0.5mmol、木糖质量分数为5%、反应温度为160℃、反应时间为10min时,糠醛最高得率可达76.6%;反应体系具有良好的稳定性,重复使用5次,催化活性没有明显下降.

In the ionic liquids,AlCl3·6H2O was found to be an effective catalyst for the dehydration of xylose.The optimum furfural yield of 76.6% was obtained from xylose under the following reaction conditions:2g 1-butyl-3-methylimidazolium chloride ([BMIM]Cl),0.5 mmol AlCl3·6H2O,5% xylose,at 160 ℃ for 10 min.These catalytic system consisting of [BMIM]Cl and AlCl3·6H2O could be reused and demonstrated stable activity after five successive runs.