化工学报 ›› 2018, Vol. 69 ›› Issue (2): 801-807.DOI: 10.11949/j.issn.0438-1157.20170981

• 能源和环境工程 • 上一篇    下一篇

[Bmim]Cl中CrCl3-AlCl3催化纤维素降解制取5-羟甲基糠醛

毛明, 冷尔唯, 龚勋, 徐明厚   

  1. 华中科技大学煤燃烧国家重点实验室, 湖北 武汉 430074
  • 收稿日期:2017-07-25 修回日期:2017-09-18 出版日期:2018-02-05 发布日期:2018-02-05
  • 通讯作者: 龚勋
  • 基金资助:

    国家科技支撑计划项目(2015BAA04B01)。

Conversion of cellulose into 5-hydroxymehylfurfural catalyzed by CrCl3-AlCl3

MAO Ming, LENG Erwei, GONG Xun, XU Minghou   

  1. State Key Laboratory of Coal Combustion, Huazhong University of Science and Techonlogy, Wuhan 430074, Hubei, China
  • Received:2017-07-25 Revised:2017-09-18 Online:2018-02-05 Published:2018-02-05
  • Supported by:

    supported by the National Key Technology R&D Program (2015BAA04B01).

摘要:

5-羟甲基糠醛是一种具有很高利用价值的化学平台化合物。以离子液体1-丁基-3-甲基咪唑氯盐([Bmim]Cl)为溶剂,以CrCl3和AlCl3为复合催化剂,在油浴加热条件下催化纤维素降解制取5-羟甲基糠醛,研究了催化剂种类、催化剂量、温度、纤维素浓度、气氛、纤维素聚合度、反应规模等不同因素对纤维素降解制取5-羟甲基糠醛的影响。结果表明,[Bmim]Cl用量为10 g,棉花添加量为0.5 g,x(CrCl3)=25%(mol),x(AlCl3)=2.5%(mol),反应温度为120℃,反应气氛为N2(dry)气氛,反应时间为4 h时,HMF产率最高,达到59%。此外,反应过程中水的作用机理也被给予了相应解释。

关键词: 离子液体, 纤维素, 5-羟甲基糠醛, 催化剂, 金属氯化物, 降解

Abstract:

5-Hydroxymehylfurfural (HMF), as a valuable platform chemical compound, can be obtained by the direct catalytic conversion of cellulose. The composite catalyst of CrCl3 and AlCl3 was used to convert cellulose into HMF in 1-butyl-3-methyl imidazole chloride ([Bmim]Cl) under oil-bath heating. The effect of catalyst dosage, temperature, cellulose amount, atmosphere, polymerization degree and reaction scale were investigated. The highest HMF yield of 59% was obtained at 4 h when 0.5 g cotton was added into[Bmim]Cl with 25%-2.5% dosage of CrCl3-AlCl3 at 120℃ under N2 (dry) atmosphere. The production efficiency was improved while the cost was reduced. Additionally, the mechanism of degradation of cellulose was proposed.

Key words: ionic liquid, cellulose, 5-hydroxymehylfurfural, catalyst, metal chlorides, degradation

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