常压反应-减压精馏集成生产甲酸环己酯的过程模拟

Process Simulation of Cyclohexyl Formate Production with an Atmospheric Reaction-Vacuum Distillation Integrated System

采用"背包式"反应精馏集成方式(DCSR),建立了甲酸和环己烯加成生产甲酸环己酯的常压反应-减压精馏新型集成工艺,反应温度与精馏温度可以独立控制,避免了甲酸在温度超过60°C时发生分解副反应。通过模拟考察了催化剂装填量、反应器台数、塔底再沸热负荷、提馏段塔板数等参数对合成甲酸环己酯的DCSR过程的影响。结果表明,在甲酸与环己烯进料流率分别为10 mol×h^(-1)下,加成酯化生产甲酸环己酯的适宜DCSR过程参数为:侧反应器台数为2台、精馏塔板数为7块板(不包含塔顶冷凝器)、塔底再沸功率为130 W、催化剂装填总量为0.6 kg、精馏塔的操作压力为10 k Pa,在反应能力与分离能力达到最优匹配时,DCSR过程的催化剂用量仅为传统反应精馏过程的30%,提高了催化剂效率,降低了设备和生产成本。

A novel atmospheric reaction-vacuum distillation integrated system was proposed to producecyclohexyl formate by coupling distillation column with side reactors （DCSR）, and the reaction and distillationtemperatures can be controlled independently to avoid formic acid decomposition above 60 ℃. The effects ofcatalyst loading, reboiler duty, number of side reactors （NR） and tray number of stripping （NS） section weresimulated. The results show that when the flow rate of cyclohexene and formic acid are 10 mol.h-l, suitableDCSR process parameters for cyclohexyl formate production are： number of side reactors 2, tray numbers 7,reboiler duty 130 W, catalyst loading capacity 0.6 kg and distillation pressure 10 kPa. When the reactioncapacity and the separation capacity are under the best matching conditions, the amount of catalyst used in theDCSR process is only 30% of the traditional reactive distillation process. Catalyst efficiency can be improvedand equipment and production costs can be reduced.