| 第 36 卷第 5 期 |  | Vol. 36 No. 5 | | 2006 年 10 月 | Oct 2006 |
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所屬欄目：有機合成原料
活性炭負載對甲苯磺酸催化合成二甲基丙烯酸丁二醇酯 |
| 白云飛; 鄭嘉明; 張水英; 楊錦祥; 趙倩(天津大學(xué)綠色合成與轉化教育部重點(diǎn)實(shí)驗室) |
| 摘 要：用活性炭負載對甲苯磺酸作催化劑,高效合成了二甲基丙烯酸丁二醇酯。比較了3種不同的負載方法對催化活性的影響,篩選出了活性最高的負載方法。在此方法下,考察了酯化反應條件對催化活性的影響,得出優(yōu)化合成條件為:n(酸)∶n(醇)=2.3∶1,催化劑(凈含量)用量為總反應物質(zhì)量的2.5%,帶水劑甲苯用量為總反應物質(zhì)量的25%,反應溫度維持在100～110℃,反應1h左右。優(yōu)化條件下,酯化率可達到95.0%,且催化劑重復使用6次,酯化率仍保持在85.0%以上,是本酯化反應較理想的催化劑。 |
| 關(guān)鍵詞：對甲苯磺酸; 二甲基丙烯酸丁二醇酯; 活性炭 |
| 中圖分類(lèi)號：TQ225.24 文獻標識碼：A 文章編號：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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