| 五氧化二铌催化酯化制备 DOP 的研究 |
| |
| 引用本文： | 魏运洋,丁来欣,常春艳. 五氧化二铌催化酯化制备 DOP 的研究[J]. 南京理工大学学报(自然科学版), 1998, 0(1) |
| |
| 作者姓名： | 魏运洋 丁来欣 常春艳 |
| |
| 作者单位： | 南京理工大学化工学院 |
| |
| 摘 要： | 用固体酸五氧化二铌作酯化催化剂，由苯酐和２－乙基己醇制备了邻苯二甲酸二（２－乙基己酯）（ＤＯＰ）。反应先快速生成中间产物邻苯二甲酸单（２－乙基己酯），然后再酯化成双酯ＤＯＰ。由单酯转化成双酯的反应为典型的二级反应，测定了二级反应的速率常数和活化能。研究了催化剂的循环使用，探讨了反应时间、反应温度和催化剂用量等因素对粗产品酸度和外观质量的影响。
|
| 关 键 词： | 铌化合物，催化剂，动力学，苯酐；金属氧化物 |
Study on DOP Preparation by Niobium Pentoxide Catalyzed Esterification |
| |
| Wei Yunyang Ding Laixin Chang Chunyan. Study on DOP Preparation by Niobium Pentoxide Catalyzed Esterification[J]. Journal of Nanjing University of Science and Technology(Nature Science), 1998, 0(1) |
| |
| Authors: | Wei Yunyang Ding Laixin Chang Chunyan |
| |
| Abstract: | Di(2 ethylhexyl) phthalate (DOP) was prepared from phthalic anhydride and 2 ethylhexanol via niobium pentoxide catalyzed esterification. Intermediate detection and kinetic study show that the reaction takes place in two stages. In the first stage, monoester is formed rapidly and in the second stage, the monoester converts to the di ester DOP via a typical second order reaction. The second order rate constants and activation energy were determined. Separation and recycling of the catalyst were studied. Effects of reaction parameters on product acidity and outward appearance were discussed. |
| |
| Keywords: | niobium compounds catalysts dynamics phthalic anhydride metal oxides |
| 本文献已被 CNKI 等数据库收录！ |
