催化学报 ›› 2014, Vol. 35 ›› Issue (3): 310-318.DOI: 10.1016/S1872-2067(12)60738-4

• 研究论文 • 上一篇    下一篇

Mg-Al水滑石催化甘油与碳酸二甲酯的酯交换反应

郑丽萍a, 夏水鑫a, 侯召同b, 张梦媛a, 侯昭胤a   

  1. a 浙江大学化学系催化研究所, 浙江杭州10028;
    b 江苏常隆化工有限公司, 江苏常州213031
  • 收稿日期:2013-09-15 修回日期:2013-10-23 出版日期:2014-02-26 发布日期:2014-02-26
  • 通讯作者: 侯昭胤
  • 基金资助:

    国家自然科学基金(21273198,21073158);浙江省自然科学基金(LZ12B03001).

Transesterification of glycerol with dimethyl carbonate over Mg-Al hydrotalcites

Liping Zhenga, Shuixin Xiaa, Zhaotong Houb, Mengyuan Zhanga, Zhaoyin Houa   

  1. a Institute of Catalysis, Department of Chemistry, Zhejiang University, Hangzhou 310028, Zhejiang, China;
    b Jiangsu Changlong Chemical Co., Changzhou 213031, Jiangsu, China
  • Received:2013-09-15 Revised:2013-10-23 Online:2014-02-26 Published:2014-02-26
  • Supported by:

    This work was supported by the National Natural Foundation of China (21273198, 21073158) and the Zhejiang Provincial Natural Science Foundation (LZ12B03001).

摘要:

报道了温和条件下甘油和碳酸二甲酯在一系列不同Mg/Al比(0.5-6)的Mg-Al水滑石催化下合成碳酸甘油酯(GC)的反应. 发现,Mg-Al水滑石对该反应具有很高的GC选择性,其中Mg/Al=2经400℃处理所得水滑石催化效率最高:70 ℃反应3 h甘油转化率达66.9%时,GC选择性维持在97%以上. 表征结果表明,水滑石样品的比表面积、孔径、结晶度和表面碱性对其催化活性影响很大.

关键词: 甘油, 碳酸甘油酯, 酯交换反应, 镁-铝水滑石

Abstract:

Glycerol carbonate (GC) was synthesized via the catalytic transesterification of glycerol with dimethyl carbonate over a series of Mg-Al hydrotalcites with different Mg/Al ratios (0.5-6) under mild conditions. All catalysts exhibited a high selectivity toward GC. The sample with Mg/Al=2 exhibited 97.1% of selectivity toward GC and 66.9% of glycerol conversion at 70℃ for 3 h. Characterization results indicated that the activity of calcined Mg-Al hydrotalcites depended mainly on the surface area, pore diameter, and crystallinity.

Key words: Glycerol, Glycerol carbonate, Transesterification, Magnesium-Aluminum hydrotalcite