催化学报

催化学报 ›› 2012, Vol. 33 ›› Issue (4): 601-604.DOI: 10.1016/S1872-2067(11)60381-1

• 研究快讯 • 上一篇    下一篇

乙酰丙酮氧钛催化苯酚和碳酸二甲酯的酯交换反应

李碧静1,2, 唐荣芝1,2, 陈彤1,*, 王公应1   

  1. 1中国科学院成都有机化学研究所, 四川成都 610041; 2中国科学院研究生院, 北京 100049
  • 收稿日期:2012-01-09 修回日期:2012-02-27 出版日期:2012-04-13 发布日期:2015-09-09

Transesterification of Phenol and Dimethyl Carbonate Catalyzed by Titanium Oxide Acetylacetonate Catalyst

LI Bijing1,2, TANG Rongzhi1,2, CHEN Tong1,*, WANG Gongying1   

  1. 1Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China; 2Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2012-01-09 Revised:2012-02-27 Online:2012-04-13 Published:2015-09-09

PDF

962

被引次数

10

摘要： 首次将乙酰丙酮氧钛用于苯酚和碳酸二甲酯的酯交换反应合成碳酸二苯酯, 显示出较好的催化活性和很高的酯交换选择性, 催化剂经 180 oC 热处理后, 苯酚转化率可达 45.8%, 转化数 (n (苯酚)/n (Ti)) 为 96, 高于有机钛类均相催化剂. 结果表明, 当乙酰丙酮氧钛用量为 0.2 g 以上, 开始有副产物苯甲醚生成, 酯交换选择性随催化剂用量的增加而降低. 该催化剂重复使用 5 次后, 苯酚转化率仍可达 40% 以上, 酯交换选择性为 99.9%, 表现出较高的重复使用性能.

关键词: 乙酰丙酮氧钛, 碳酸二苯酯, 酯交换, 苯酚, 多相催化剂

Abstract: Titanium oxide acetylacetonate (TiO(acac)2) was found to be a novel and efficient heterogeneous catalyst for the transesterification of phenol and dimethyl carbonate (DMC) to diphenyl carbonate (DPC). The conversion of phenol was 45.8% on the TiO(acac)2 pretreated at 180 oC, and the turnover number reached 96, which was better than the more common organic titanium catalyst. The effect of the amount of catalyst on the catalytic performance was investigated. The transesterification selectivity decreased with catalyst loadings over 0.2 g per 100 ml reactants. At the optimized amount of catalyst the conversion of phenol was 42.4%, and no anisole was detected. In particular, the TiO(acac)2 catalyst proved reusable, and catalytic activity of the recovered TiO(acac)2 was almost the same as that of the fresh catalyst. The conversion of phenol 40.0% was attained from TiO(acac)2 recovered for the fifth time.

Key words: titanium oxide acetylacetonate, diphenyl carbonate, transesterification, phenol, heterogeneous catalyst