摘要
针对以碳酸丙烯酯(PC)和甲醇(MeOH)为原料反应精馏合成碳酸二甲酯(DMC)塔顶DMC-MeOH共沸物分离问题,提出以PC为萃取剂、萃取精馏分离共沸物的工艺。在Aspen Plus软件平台上开展模拟与经济性评价研究,考察了萃取剂的可行性和选择性,确定了工艺流程方案,对萃取精馏流程的工艺参数进行了优化;比较了PC萃取精馏与热集成变压精馏分离DMC-MeOH共沸物的能耗与经济性。结果表明,萃取精馏工艺的总能耗和年总费用(TAC)较变压精馏工艺分别降低了53.9%和49.5%,体现了萃取精馏工艺的可行性和技术经济优势。
Aiming at the separation of DMC-MeOH azeotrope at the top of the tower for dimethyl carbonate(DMC)production by reactive distillation with propylene carbonate(PC)and methanol(MeOH)as raw materials,a extractive distillation process with PC as solvent was presented.The simulation and economic evaluation were carried out on the Aspen Plus software platform.The feasibility and selectivity of the solvent were investigated,the process flow scheme was determined,and the process parameters of the extractive distillation process were optimized.The energy consumption and economy of PC extractive distillation and heat integrated pressure swing distillation for separating DMC-MeOH azeotrope were compared.The results show that the total energy consumption and total annual cost(TAC)of the extractive distillation process are reduced by 53.9%and 49.5%,respectively,compared with the pressure swing distillation process,showing the feasibility and technical and economic advantages of the extractive distillation process.
作者
马长金
李腾
安维中
林子昕
别海燕
MA Changjin;LI Teng;AN Weizhong;LIN Zixin;BIE Haiyan(Department of Chemical Engineering,Ocean University of China,Qingdao 266100,Shandong,China)
出处
《化工进展》
CSCD
北大核心
2024年第12期6608-6614,共7页
Chemical Industry and Engineering Progress
关键词
碳酸丙烯酯
萃取精馏
碳酸二甲酯
优化设计
经济评价
propylene carbonate
extractive distillation
dimethyl carbonate
optimal design
economic evaluation
