催化学报

催化学报 ›› 2010, Vol. 31 ›› Issue (1): 38-43.

• 研究论文 • 上一篇    下一篇

KF/MgO 催化碳酸二甲酯与月桂醇酯交换合成碳酸二月桂酯

范燕平 1,2,3, 王庆印 1, 杨先贵 1, 姚洁 1,2, 王公应 1,2   

  1. 1 中国科学院成都有机化学研究所, 四川成都 610041 2 常州化学研究所, 江苏常州 213164 3 中国科学院研究生院, 北京 100049
  • 收稿日期:2010-01-25 出版日期:2010-01-25 发布日期:2010-01-25

Transesterification of Dimethyl Carbonate with Dodecanol to Didodecyl Car-bonate over KF/MgO Catalyst

FAN Yanping1,2,3, WANG Qingyin1, YANG Xiangui1, YAO Jie1,2, WANG Gongying1,2,*   

  1. 1Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China 2Changzhou Institute of Chemistry, Changzhou 213164, Jiangsu, China 3Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2010-01-25 Online:2010-01-25 Published:2010-01-25

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1103

被引次数

45

摘要： 研究了 KF/MgO 催化剂对碳酸二甲酯 (DMC) 与月桂醇酯交换反应制备碳酸二月桂酯 (DDC) 的催化性能. 考察了催化剂 KF 负载量及焙烧温度对反应的影响, 并采用 X 射线衍射、傅里叶变换红外光谱、扫描电镜和 N2 吸附-脱附等对催化剂进行了表征. 结果表明, 催化剂 KF/MgO 在空气中较高温度焙烧后生成新相 K2MgF4 和 K2CO3, 它们为催化剂的主要活性组分. 催化性能测试结果表明, 该催化剂具有良好的催化活性, KF 的最佳负载量为 30%, 催化剂的最佳焙烧温度为 873 K. 还考察了反应条件对 KF/MgO 催化剂性能的影响. 当在反应物月桂醇:DMC 摩尔比 = 4, 催化剂用量为反应物总质量的 0.75%, 反应时间为 4 h 的条件下, 反应性能最佳, DMC 转化率和 DDC 收率分别为 86.7% 和 86.2%.

关键词: 碳酸二甲酯, 酯交换, 碳酸二月桂酯, 氟化钾, 氧化镁, 负载型催化剂

Abstract: The catalytic activity of KF/MgO for the synthesis of didodecyl carbonate (DDC) by transesterification of dimethyl carbonate (DMC) with dodecanol (DoOH) was studied. The effects of KF loading and calcination temperature were investigated. The catalysts were characterized by X-ray diffraction,?Fourier transform infrared spectroscopy, scanning electron microscopy, and N2 adsorption-desorption. The results indicated that new phases K2MgF4 and K2CO3 were formed when KF/MgO was calcined in air at high temperature. K2MgF4 and K2CO3 were the main catalytic sites in this reaction. KF/MgO was an effective catalyst in this transesterification reaction and the optimized KF loading and calcination temperature were 30% and 873 K, respectively. The optimized reaction conditions were as follows: n(DoOH):n(DMC) = 4, catalyst amount 0.75%, reaction time 4 h. Under these conditions, the conversion of DMC and the yield of DDC were 86.7% and 86.2%, respectively.

Key words: dimethyl carbonate, transesterification, didodecyl carbonate, potassium fluoride, magnesium oxide, supported catalyst