"背包式"反应精馏生产甲基丙烯酸甲酯集成工艺
Simulation and optimization of reaction-distillation coupling process for methyl methacrylate production
孙玉玉 1汤吉海 2蔡鑫磊 1黄益平 1黄晶晶 1刘丹阳 2乔旭2
作者信息
- 1. 中建安装集团有限公司,江苏 南京 210023
- 2. 南京工业大学 化工学院,材料化学工程国家重点实验室,江苏 南京 211816
- 折叠
摘要
针对酯化反应体系存在最劣沸点序列,导致反应精馏效率低下的问题,设计了过量进料的反应与精馏耦合(SRC)工艺.以酯化反应合成甲基丙烯酸甲酯(MMA)为研究对象,建立了甲醇过量进料(CS1-SRC)和甲基丙烯酸过量进料(CS2-SRC)的 2 种SRC工艺,考察了原料过量比、侧反应器台数NR及CS2-SRC中萃取水进料量对生产过程能耗的影响.结果表明,在基准反应物处理量为 1.28×105 mol.h-1,总转化率≥99.5%,wMMA≥99.5%的设计指标下,CS2-SRC工艺具有显著优势,此时,甲基丙烯酸过量比nMAA:nMeOH为 1.2,NR为 2,侧反应器中甲基丙烯酸分配比为 0.75:0.25,萃取水进料量为甲醇进料的 2.42 倍,全流程塔釜加热负荷 3 027 kW,较CS1-SRC工艺能耗降低 39.67%.
Abstract
An overfeeding reaction-distillation coupling process(SRC)was designed to obtain high efficiency,as the existing unfavorable boiling points sequence in the reaction system of esterification causes low efficiency.For the esterification system of methyl methacrylate(MMA)production,the overfeeding SRC with excess methanol(CS1-SRC)and methacrylic acid(CS2-SRC)were established.The effects of raw material excess ratio,side-reactor number(NR)and extraction water dosage in CS2-SRC on the performance of energy consumption were systematically studied.The designed CS2-SRC process shows advantage under the design conditions of:reference reactant 1.28×105 mol.h-1,total conversion≥99.5%and wMMA≥99.5%.The optimal parameters are:methacrylic acid excess ratio 1.2,NR=2,methacrylic acid distribution ratio 0.75:0.25,extraction water excess ratio 2.42 and reboiler duty 3 027 kW.Compared with CS1-SRC,the reboiler duty of CS2-SRC is reduced by 39.67%.
关键词
甲基丙烯酸甲酯/反应与精馏耦合/优化设计/过量进料/模拟Key words
methyl methacrylate/reaction-distillation coupling process/optimal design/overfeeding/simulation引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据