文献类型：期刊文献

中文题名：连四甲苯液相氧化过程热力学分析及动力学模拟

英文题名：Thermodynamic analysis and kinetic simulation of liquid phase oxidation of prehnitene to mellophanic acid

作者：Lyu, Quanming[1]; Sun, Weizhen[1]; Zhao, Ling[1,2]

机构：[1] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] School of Chemistry & Chemical Engineering, Xinjiang University, Urumqi, 830046, China

年份：2021

卷号：72

期号：2

起止页码：1009

外文期刊名：Huagong Xuebao/CIESC Journal

收录：EI(收录号：20211010022568)

语种：中文

外文关键词：Reaction kinetics - Catalysts - Oxidation - Temperature - Industrial research - Thermoanalysis

摘要：The liquid phase oxidation of prehnitene (PR) to mellophanic acid (MPA) is a key step in the synthesis process of polyimide monomers. In this work, thermal properties of PR liquid phase oxidation were calculated, in which the thermodynamic parameters of MPA were estimated by group contribution methods. The results show that this reaction is a strong exothermic reaction within the studied temperature range, thus the reaction heat should be carefully controlled during the reaction process. Then the optimal reaction conditions were determined by batch experiments in the ranges of 200-240℃, and a lumped kinetics model under different temperatures, catalyst concentrations and ratios were established. It is found that the catalyst ratio of Co/Mn/Br has a great influence on the generation rate of MPA, while little on the oxidation rate of PR. Particularly, the increase of Mn content has the best effect on the increase of MPA generation rate. Simultaneously, the increase of temperature can significantly accelerate the rate of PR oxidation with an activation energy of 57.20 kJ?mol-1. However, the activation energy of other methyl groups increased to 120.30 kJ?mol-1 when part of methyl groups on the benzene ring were oxidized to carboxyl groups, indicating that the existence of carboxyl groups can weaken the activity of methyl groups and increase the difficulty of further oxidation. The related research results of the thesis can provide references for the development of new MPA production processes and the design of industrial reactors. ? 2021, Editorial Board of CIESC Journal. All right reserved.