Chin. J. Org. Chem. ›› 2015, Vol. 35 ›› Issue (2): 404-410.DOI: 10.6023/cjoc201408034 Previous Articles     Next Articles



汪亚美a, 王新承a, 李顺杰a, 黄崇品a,b, 宋彦磊a, 陈标华a   

  1. a 北京化工大学化工资源有效利用国家重点实验室 北京 100029;
    b 北京化工大学常州先进材料研究院 常州 213000
  • 收稿日期:2014-08-28 修回日期:2014-09-26 发布日期:2014-10-30
  • 通讯作者: 黄崇品
  • 基金资助:

    国家自然科学基金(No. 21476021)和国家重点基础研究发展计划(No. 2010CB226902)资助项目.

Application of Polymeric Ionic Liquids in the Catalytic Conversion of Fructose to Lactic Acid

Wang Yameia, Wang Xinchenga, Li Shunjiea, Huang Chongpina,b, Song Yanleia, Chen Biaohuaa   

  1. a State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029;
    b Changzhou Research Institute of Advanced Materials, Beijing University of Chemical Technology, Changzhou 213000
  • Received:2014-08-28 Revised:2014-09-26 Published:2014-10-30
  • Supported by:

    Project supported by the National Natural Science Foundation of China (No. 21476021) and the National Basic Research Program of China (No. 2010CB226902).

Preparation of lactic acid via chemical transformation of carbohydrates requires rigorous reaction conditions, such as high concentrations of alkali, high temperature, etc. This paper reports the use of polymeric ionic liquids ([IMEP]Cl) as catalyst for the hydrothermal conversion of fructose to lactic acid; the main variables of the reaction, temperature, substrate concentration, as well as the relative amount of [IMEP]Cl and NaOH were optimized. Results showed that, at 100 ℃, substrate concentration of 25 mmol/L, reaction time of 30 min, the highest yield of lactic acid was 65% with [IMEP]Cl and NaOH concentrations of 100 and 50 mmol/L respectively. This method reduces the reaction temperature and alkali concentration compared to traditional hydrothermal method, additionally it was found that [IMEP]Cl can be used during 5 catalytic cycles without losing its catalytic effect with a lactic acid yield of 55% in the 5th reuse cycle. This demonstrates that the use of polymer ionic liquids as catalysts has a better prospect for future developments. A possible reaction mechanism has been proposed, but further investigation is required.

Key words: polymeric ionic liquids, fructose, lactic acid