正丁醇乙氧基化反应动力学研究  

Kinetics of n-Butanol Ethoxylation

作　　者：安维中[1] 董凤蕾[1] 刘兆滨 朱建民 

机构地区：[1]中国海洋大学化学化工学院,山东青岛266100 [2]辽宁奥克化学集团,辽宁辽阳111003

出　　处：《高校化学工程学报》2008年第4期611-617,共7页Journal of Chemical Engineering of Chinese Universities

基　　金：辽宁省科学技术攻关计划项目(JH2/01-ZT102-04)

摘　　要：研究了固体碱催化下、半间歇操作正丁醇乙氧基化的动力学问题。在2L反应釜中测定了动力学及环氧乙烷在反应混合物中的溶解度数据。依据SN2反应机理和各步加成反应速率相等的假设,建立了动力学模型。在模型参数求解时,将环氧乙烷的液相主体浓度视为其在反应混合物中的溶解度,用Aspen plus软件考查了体系的相平衡关系,建立了基于Wilson方程的环氧乙烷溶解度的计算方法和关联模型。利用数值方法求解动力学模型得到动力学参数,利用实验数据验证了其可靠性。The kinetics of n-butanol ethoxylation under base-catalyzed conditions in semi-batch reactor was studied. A series runs of studying the ethoxylation kinetics and ethylene oxide solubility were conducted in a 2L semi-batch stirred laboratory autoclave. Based on the SN2 reaction mechanisms, a kinetic model of n-butanol ethoxylation was established by supposing that the reaction rate of all addition steps are approximately identical, In this model, the bulk concentration of ethylene oxide in liquid phase was treated as its solubility in reaction mixture. The vapor-liquid equilibrium of system were investigated by means of Aspen Plus simulation software, and a method for estimating ethylene oxide solubility in reaction mixtures was developed based on Wilson model. The kinetic parameters of n-butanol ethoxylation were determined through numerical method and verified by the experimental data. The results show that the ethoxylation behavior predicted by the suggested method is in good agreement with the experimental measurement.

关 键 词：正丁醇 乙氧基化 动力学 环氧乙烷 半间歇操作反应釜 

分 类 号：TQ013.2[化学工程] TQ203.9