摘要
针对乙二醇与1,2-丁二醇性质相近且存在共沸物导致分离难度大、成本高的问题,选择了5-壬酮为萃取剂分离乙二醇和1,2-丁二醇混合物。在常压下测定了40、60、78℃时乙二醇-1,2-丁二醇-5-壬酮三元体系的液液平衡数据,使用Hand方程和Othmer-Tobias方程验证了数据的可靠性。采用NRTL和UNIQUAC模型方程对液液平衡数据进行关联,分别得到了三元体系的模型参数,同时计算了1,2-丁二醇的分离因数和萃取率。结果表明,模型方程在实验范围内均具有良好的适用性,5-壬酮在78℃下对1,2-丁二醇表现出良好的萃取选择性和较高的萃取率。研究结果为相关计算模拟及工业装置设计提供理论依据及数据支持。
It is difficult and costly to separate ethylene glycol and 1,2-butanediol due to their similar properties and azeotropy problems.5-nonanone was selected as the extraction agent to separate the mixture of ethylene glycol and 1,2-butanediol.Liquid-liquid equilibrium(LLE)data(ethylene glycol-1,2-butanediol5-nonanone)were observed at 40,60 and 78℃under atmospheric pressure.The Hand equation and the Othmer-Tobias equation were used to examine the consistency of the experimental data,and the NRTL and UNIQUAC model were used to correlate the observed LLE data,and their model parameters were obtained.RMSD show that the model equations have good applicability in the experimental range.The separation factors and extraction rates of 1,2-butanediol were also calculated,which show 5-nonanone have a good extraction selectivity and high extraction rate for 1,2-butanediol at 78℃.Research results provide theoretical basis and data support for calculation simulation and industrial device design.
作者
陈培昱
王成习
王恒秀
陈纪忠
CHEN Peiyu;WANG Chengxi;WANG Hengxiu;CHEN Jizhong(College of Chemical and Biological Engineering,Zhejiang University,Hangzhou 310058,China;Jiangsu Hengxing New Material Technology Co.Ltd.,Yixing 214200,China)
出处
《高校化学工程学报》
北大核心
2025年第1期30-35,共6页
Journal of Chemical Engineering of Chinese Universities
关键词
乙二醇
1
2-丁二醇
5-壬酮
液液平衡
萃取
Ethylene glycol
1,2-butanediol
5-nonanone
liquid-liquid equilibrium
extraction
