摘要
针对乙醇-碳酸二甲酯二元共沸物分离难题,分别以糠醛和离子液体(1-己基-3-甲基咪唑双三氟甲磺酰亚胺盐)为萃取溶剂,对乙醇-碳酸二甲酯二元共沸体系萃取精馏进行了流程设计和模拟计算。以全年总费用(TAC)为优化目标,对糠醛萃取精馏工艺的溶剂比、溶剂进料位置、原料进料位置、回流比和总理论板数等工艺参数进行了优化,实现了乙醇和碳酸二甲酯的有效分离,产品纯度可达到99.95%以上。主要条件不变,萃取剂换为离子液体时,计算结果表明,萃取精馏工艺设备费用增加了5.90%,能耗费用降低了20.76%,TAC降低了11.52%,该工艺具有一定的工业意义。
Aiming at the problem of separation of binary azeotrope of ethanol and dimethyl carbonate, the extractive distillation process of ethanol and dimethyl carbonate binary azeotrope system was designed and simulated with furfural and ionic liquid(1-hexyl-3-methylimidazole bis trifluoromethylsulfonimide salt) as extraction solvents respectively. Taking the total annual cost(TAC) as the optimization target, the solvent ratio, solvent feed position, raw material feed position, reffux ratio total theoretical plate number and other process parameters of furfural extractive distillation process were optimized. The effective separation of ethanol and dimethyl carbonate is realized, and the purity of the product can reach more than 99.95%. When the main conditions remained unchanged and ionic liquid was used as extractant, the calculation results show that the equipment cost of extractive distillation process increases by 5.90%, the energy consumption cost decreases by 20.76%, and the TAC decreases by 11.52%. This process has certain industrial significance.
作者
安永胜
赵国超
谢小强
黄晓卉
王宁
石竟成
李冉
李群生
AN Yongsheng;ZHAO Guochao;XIE Xiaoqiang;HUANG Xiaohui;WANG Ning;SHI Jingcheng;LI Ran;LI Qunsheng(China Petroleum Pipeline Engineering Corporation,Langfang 065099,Hebei,China;College of Chemical Engineering,Beijing University of Chemical Technology,Beijing 100029,China)
出处
《天然气化工—C1化学与化工》
CAS
北大核心
2022年第5期130-137,共8页
Natural Gas Chemical Industry
关键词
二元共沸物
萃取精馏
糠醛
离子液体
模拟优化
TAC
binary azeotrope
extractive distillation
furfural
ionic liquid
simulation optimization
TAC
