反应精馏制备三氟乙酸乙酯

论文编号:ZY108    论文字数:10556,页数:26

摘 要：用传统工艺制备三氟乙酸乙酯存在原料消耗大、能耗高、设备投资大、生产周期长、产品纯度低和操作难度高等缺点。本文在对三氟乙酸乙酯生产体系各物性特点分析的基础上，引入反应精馏技术，将化学反应和精馏分离结合在一个设备中同时进行，减少了设备投资，实现了连续化生产。以三氟乙酸、乙醇为原料，以浓硫酸为催化剂，对反应精馏法制备三氟乙酸乙酯的过程进行了实验研究。着重考察了回流比、配料比、反应温度、催化剂用量等因素对三氟乙酸乙酯的收率和产品中三氟乙酸乙酯含量的影响，并得出最佳的工艺条件。
关键词： 三氟乙酸乙酯；三氟醋酸；乙醇；反应精馏

Abstract: Preparation of ethyl trifluoroacetate (TFAE) with traditional procedures had many disadvantages such as the raw materials waste, high energy consumption, amounts of equipment’s investments, long production period, difficult operation, etc. The reactive distillation method was introduced based on analysis of every component’s characteristics in the production system of TFAE. Combined reaction with distillation, the equipment’s investments was reduced and the production would be carried continuously. Preparation of TFAE through reactive distillation process had been researched, with trifluoroacetic acid and ethanol as raw materials, concentrated sulfuric acid as the catalyst. The experiments were focused on the reflux ratio, the mole ratio of components, reaction temperature, amount of catalyst and other factors influencing the yield and purity of TFAE, Finally, the optimum reaction conditions were obtained.
Key words: Ethyl trifluoroacetate; Trifluoroacetic acid; Ethanol; Reactive distillation

目  录
中文摘要 Ⅰ
英文摘要 Ⅱ
目录 Ⅲ
1. 绪论 1
   1.1  三氟乙酸乙酯的介绍 1
   1.2  项目概况 1
   1.3  反应精馏技术的发展史 2
       1.3.1  反应精馏技术的应用范围 3
       1.3.2  反应精馏的操作工艺 3
       1.3.3  反应精馏的适用条件和工业要求 4
   1.4  本文的研究目的及研究内容 4
2. 实验部分 5
 2.1  实验试剂及实验仪器 5
 2.2  实验装置 5
 2.3  制备原理 6
 2.4  反应精馏工艺流程 7
 2.4.1  三氟乙酸乙酯的物系性质 7
 2.4.2反应精馏合成三氟乙酸乙酯的工艺流程 8
 2.4.3产品的分析 9
 2.4.4计算公式 11
3. 结果与讨论 12
 3.1实验结果 12
 3.2催化剂用量的影响 13
 3.3三氟乙酸与乙醇摩尔比的影响 16
 3.4回流比的影响 17
 3.5小结 19
4总结和展望 21
致谢 22
参考文献 23