马来酸酐与十八醇酯化反应研究  

Studies on the Kinetics of the Synthesis of Octadecyl Dimaleates

作　　者：胡合贵[1] 戚国荣[1] 李新华[2] 周孝瑞[2] 徐建平 

机构地区：[1]浙江大学高分子科学与材料研究所,浙江杭州310027 [2]杭州应用工程技术学院,浙江杭州310012

出　　处：《高校化学工程学报》1999年第5期466-469,共4页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金!59073123

摘　　要：本文以对甲苯磺酸为催化剂，讨论了催化剂用量、反应温度等对马来酸单酯及马来酸酐与十八醇酯化反应的影响，发现当催化剂用量大于1．7g时，反应速率与催化剂用量无关。在本实验反应体系下，测定了各步反应的活化能，验证了反应动力学方程：d[C]／dt＝13575[A][B]exp（-1202／T）-61700[B][C]exp（-4478／T）；d[D]／dt＝61700[B][C]exp（-4478／T）In this paper, the esterification of maleic anhydride and octadecyl alcohol was carried outwith p-toluene sulphonic acid as catalyst, and the concentration of octadecyl dimaleates was obtainedfrom the volume of water collected. At the same time, the effects of temperature, concentration ofcatalyst, etc., on the reaction rate of esterification were investigated. Moreover, the reaction mechanismwas discussed and a kinetics equation has been proposed (catalyst >1.7g (per 0.1 mol maleicanhydride));d[C]/dt=13575[B][A]exp(-1202/T) -61700[C][B]exp(-4478/T), d[D]/dt=61700[B][C]exp(-4478/T)in which [A], [B], [C] and [D] are concentrations of maleic anhydride, octadecyl alcohol, octadecylmonomaleate acid and octadecyl dimaleates, respectively.

关 键 词：动力学 酯化 马来酸酐 十八醇 单十八醇酯 

分 类 号：O626.1[理学—有机化学] O623.624.2[理学—化学]