| 第 36 卷第 5 期 |  | Vol. 36 No. 5 | | 2006 年 10 月 | Oct 2006 |
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所属栏目：有机合成原料
活性炭负载对甲苯磺酸催化合成二甲基丙烯酸丁二醇酯 |
| 白云飞; 郑嘉明; 张水英; 杨锦祥; 赵倩(天津大学绿色合成与转化教育部重点实验室) |
| 摘 要：用活性炭负载对甲苯磺酸作催化剂,高效合成了二甲基丙烯酸丁二醇酯。比较了3种不同的负载方法对催化活性的影响,筛选出了活性最高的负载方法。在此方法下,考察了酯化反应条件对催化活性的影响,得出优化合成条件为:n(酸)∶n(醇)=2.3∶1,催化剂(净含量)用量为总反应物质量的2.5%,带水剂甲苯用量为总反应物质量的25%,反应温度维持在100～110℃,反应1h左右。优化条件下,酯化率可达到95.0%,且催化剂重复使用6次,酯化率仍保持在85.0%以上,是本酯化反应较理想的催化剂。 |
| 关键词：对甲苯磺酸; 二甲基丙烯酸丁二醇酯; 活性炭 |
| 中图分类号：TQ225.24 文献标识码：A 文章编号：1009-9212(2006)05-0063-04 |
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| P-Toluenesulfonic Acid Supported on Activated Carbon as the Catalyst for the Esterification of Methylacrylic Acid by Butanediol |
| BAI Yun-fei; ZHENG Jia-ming; ZHANG Shui-ying; YANG Jin-xiang; ZHAO Qian（Key Laboratory for Green Chemical Technology of the Ministry of Education; School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072; China） |
| Abstract：Butanediol dimethylacrylate was effectively synthesized by direct esterification from butanediol and methylacrylate over p-toluenesulfonic acid supported on activated carbon as the catalyst.The best method of supporting was obtained.Under the optimum reaction conditions which were obtained as follows:reaction temperature 100～110℃,reaction time 1 h,the molar ratio of methylacrylic acid to butanediol was 2.3∶1,the amounts of catalyst and toluene were 2.5% and 25% relatively,the yield of Butanediol dimethylacr... |
| Key words：supported p-toluenesulfonic acid; butanediol dimethylacrylate; activated carbon |
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收稿日期：2006-07-12
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