半间歇操作模式下催化精馏制乙二醇单丁醚的数学模拟.PDF

半间歇操作模式下催化精馏制乙二醇单丁醚的数学模拟 1，2 1 l 2 2 2 安维中 ，于凤娟 ，国洪超 ，周立明 ，刘兆滨 ，朱建民 (1．中国海洋大学化学化工学院，山东青岛 266100：2．大连理工奥克博士后工作站，辽宁 辽阳 111003) 摘要：提出正丁醇乙氧基化催化精馏制乙二醇单丁醚的新工艺方法。建成一个催化精馏塔， 提出一种基于安全考虑的半间歇操作的实验方案。建立了催化精馏塔的动态数学模型，通过 模拟考查了环氧乙烷进料速率对反应物转化率和单醚选择性的影响。得到优化的操作条件。 在此基础上，通过模拟分析了塔内温度、气液相流量及组分组成的动态分布特性，并与实验 结果进行了比较。研究表明了模型和模拟方法的可靠性，同时表明了催化精馏制乙二醇单丁 醚的优越性。 关键词：半间歇；催化精馏；乙二醇单丁醚；动态模型；模拟 中图分类号：TQ223．24，TQ021．8 Mathematical Simulation of Catalytic Distillation for Producing Ethylene Glycol Monobutyl Ether Operated in a Semi—batch Mode An Weizhon91，Yu Fen 西 uanl，Gou Hongchao I Zhou Limin92，Liu Zhaobinz，Zhu Jianmin2 (1．Department of Chemical Engineerin9，Ocean University of China,Qingda0，266100， China；2．LiaoninOxiranchem Group，Liaoyan9，111003，China) Abstract：A new application of catalytic distillation(CD)for the production of ethylene glycol monobutylether(EGMBE)from n-butanol ethoxylation was developed．A pilot-scale CD column was built up and anexperiment scheme operated in a semi—batch mode was proposed for safety consideration．A dynamicmodel Was developed for the description of the semi—batch CD process．Simulations were performed toobtain the optimal and safe operating conditions by means of investigating the effect of feed flowrate ofethylene oxide(Eo)on conversion and selectivity toward EGMBE．The simulation results involved thetypically dynamic profiles of temperature，flow rates of liquid and vapor phases，composition of liquid andvapor phases，which were compared with the experimental data．The results obtained indicated the methoddeveloped WaS reaSonable，and also the potential advantage of using CD for the production of EGMBE． Key words：semi-batch,catalytic distillation；ethylene glycol monobutyl ether； dynamic model；simulation 乙二醇单丁醚(EGMBE)是环氧乙烷的重要衍生物之一，是优良的溶剂和有机合成中间体， 广泛应用于印染、涂料及油墨等工业领域[1]。乙二醇单丁醚