文档介绍：Vol . 34 , No. 4 Apr. 2 0 1 1 第 34 卷第 4 期 2011 年 4 月 HEBEI HUAGONG 邻苯二甲酸二乙酯的合成朱蕾, 李公春, 姜丹( 许昌学院化学化工学院, 河南许昌 461000 ) 摘要:以邻苯二甲酸酐和无水乙醇为原料,对甲基苯磺酸为催化剂,环己烷为带水剂,在加热搅拌条件下回流 8 h , 合成邻苯二甲酸二乙酯。反应结束后,常压蒸馏除去乙醇。冷却后,经减压蒸馏得产品,产率为 49 . 5 % ,产物经 IR 和折光率表征为目标产物。关键词: 邻苯二甲酸二乙酯; 对甲基苯磺酸; 环己烷; 合成中图分类号: TQ 245 . 2 4 文献标识码: A 文章编号:1003 -5095 (2011 )04 -0037 -03 Synthesis of Diethyl Phthalate Z H U L e i , L I G o n g - c h u n , J I A N G D a n (College of Chemistry and Chemical Engineering, Xuchang University, Xuchang 461000 , China) Abstract: Diethyl phthalate was synthesized by refluxing for 8h under the conditions of stirring, with phthalic anhydride and anhydrous ethanol as raw material, p-methylbenzenesulfonic acid as catalyst, cyclohexane as water the reaction, ethanol was distilled under the conditions of was collected under the conditions of the vacu - um distillation, the yield was 49 . 5%. The structure of pound founctions were confirmed by IR spectral charac - terization. Key w ords: diethyl phthalate; p-methylbenzenesulfonic acid; cyclohexane; synthesis 邻苯二甲酸二乙酯(DEP) 又称邻酞酸二乙酯或酞酸乙酯,是一种无毒、无色、透明的油状液体, 可用于塑料、纤维树脂的增塑,其低温柔软性与耐久性优于邻苯二甲酸二甲酯,常与邻苯二甲酸二甲酯并用于醋酸纤维素,用以提高制品的耐水性、弹性、耐光性及硬度;用于硝基纤维素,可获得强度高、耐光性好、无臭味的制品[ 1 ] 。 DEP 可用作聚乙酸乙烯酯乳化液的增粘剂、在药剂制造中用作溶剂及润滑剂、香料留香剂、食品包装薄膜的无毒胶粘剂、有色或稀有金属矿山浮选的起泡剂、气相色谱固定液、酒精变性剂、喷雾杀虫剂、火箭推进剂的稳定剂等[ 2 ] 。尽管 DEP 由于挥发性大,使其发展受到一定限制, 但在其它领域,如用于生产醋酸和丁酸