Key Laboratory for Green Chemical Technology of State Education Ministry, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
Carbohydr Polym. 2013 Jan 30;92(1):218-22. doi: 10.1016/j.carbpol.2012.08.095. Epub 2012 Aug 31.
The conversion of cellulose into valuable chemicals to deal with the depletion of fossil fuel has got much attention. Completing the hydrolysis of cellulose under mild conditions is the key step. In this study, six kinds of SO(3)H-functionalized acidic ionic liquids were used as acid catalyst to promote the hydrolysis of cellulose in 1-butyl-3-methylimidazolium chloride ([BMIM]Cl). All of them were efficient for the hydrolysis of cellulose, with the maximum total reducing sugars (TRS) yields over 83% at 100 °C. Acidic ionic liquids with analogous structures showed similar catalytic activities. Triethyl-(3-sulfo-propyl)-ammonium hydrogen sulfate (IL-5 in this study) was the optimum ionic liquid for cellulose hydrolysis, with the maximum TRS yield at 100 °C up to 99% when the dosage used was 0.2g. In addition, the water in [BMIM]Cl had negative effect on cellulose hydrolysis. Therefore, controlling the content of water in a comparatively low level is quite necessary.
将纤维素转化为有价值的化学品以应对化石燃料的枯竭已经引起了广泛关注。在温和条件下完成纤维素的水解是关键步骤。在这项研究中，六种 SO(3)H 功能化酸性离子液体被用作酸催化剂，以促进 1-丁基-3-甲基咪唑氯化物([BMIM]Cl)中纤维素的水解。它们都对纤维素的水解具有很高的催化活性，在 100°C 下最大总还原糖(TRS)产率超过 83%。具有类似结构的酸性离子液体表现出相似的催化活性。三乙基-(3-磺酸丙基)-铵硫酸氢盐(本研究中的 IL-5)是纤维素水解的最佳离子液体，当用量为 0.2g 时，在 100°C 下最大 TRS 产率高达 99%。此外，[BMIM]Cl 中的水对纤维素水解有负面影响。因此，将水的含量控制在较低水平是非常必要的。
