摘要
为开发聚对苯二甲酸乙二醇酯聚酯单体新的生产工艺,利用剩余曲线图,对反应精馏直接酯化合成的可行性进行了分析。利用Aspen Plus软件,就现行的多釜串联酯化反应工艺和反应精馏塔合成工艺进行了模拟比较。讨论了酯化反应精馏塔操作参数、回流比、进料位置、塔顶馏出率等对反应的转化率和选择性的影响。结果表明。反应精馏工艺比传统的多釜串联工艺具有较高的酯化率和选择性,同时简化了流程。
To explore a new technology for synthesis of bis(2-hydroxyethyl) terephthalate from terephthalic acid and ethylene glycol, feasibility of reactive distillation process for the direct esterification was analyzed with the aid of residue curve map using Aspen Plus simulation package. Simulation was performed for both conventional process which was carried out in a tanks - in - series agitated reactor and new reactive distillation process with the assumption of simultaneous reaction and physical equilibrium. Effects of several key operation factors such as feed stage location, reflux ratio, distillate molar flow rate on reaction conversion and selectivity were investigated. Simulation results showed that reaction conversion and selectivity increased significantly with increasing distillate flow rate or distillate to feed ratio. Reactive distillation technology offers obvious potential advantages of increase in conversion and selectivity, simplified flowsheet and reduced capital cost over conventional process.
出处
《石油化工》
CAS
CSCD
北大核心
2004年第5期432-436,共5页
Petrochemical Technology
