| 正己烷–异丙醇共沸体系液液相平衡数据测定及关联 |
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| 引用本文： | 杨冲,林旭枫,张金锋,陈宏,肖业鹏,王慧,程丽华,欧阳新平. 正己烷–异丙醇共沸体系液液相平衡数据测定及关联[J]. 化工学报, 2020, 71(7): 3009-3017. DOI: 10.11949/0438-1157.20191001 |
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| 作者姓名： | 杨冲 林旭枫 张金锋 陈宏 肖业鹏 王慧 程丽华 欧阳新平 |
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| 作者单位： | 1.广东石油化工学院化学工程学院，广东 茂名 525000;2.广东石油化工学院广东省石油化工腐蚀与安全工程技术 研究中心，广东 茂名 525000;3.华南理工大学化学与化工学院，广东 广州 510640 |
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| 基金项目： | 安徽师范大学培育项目;广东省科技创新战略专项;广东省普通高校青年创新人才类项目;广东石油化工学院科研基金项目 |
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| 摘 要： | 为了给溶剂萃取分离正己烷–异丙醇混合物的过程设计和流程模拟计算提供基础数据,以二甲亚砜、1,4-丁二醇、1,2-丙二醇、乙腈、糠醛和N,N-二甲基甲酰胺为萃取剂,测定了30℃下萃取分离正己烷–异丙醇混合物的液液相平衡数据,并利用分离因子评价不同萃取剂的萃取分离性能。根据Hand方程对实验数据进行一致性和可靠性检验,拟合方程的相关系数都在0.98以上。随后,采用Aspen Plus软件选取NRTL活度系数模型对相平衡数据进行关联,得到相应的二元交互作用参数,并以此计算相应的相平衡组成。结果显示,计算值和实验值的均方根偏差小于1.0%,表明NRTL模型能够准确描述三元体系的液液相平衡。
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| 关 键 词： | 相平衡 正己烷 异丙醇 共沸物 溶剂萃取 NRTL模型 |
| 收稿时间： | 2019-09-06 |
| 修稿时间： | 2020-04-27 |
Measurement and correlation of liquid-liquid equilibrium data for n-hexane- isopropanol azeotropic system |
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| YANG Chong,LIN Xufeng,ZHANG Jinfeng,CHEN Hong,XIAO Yepeng,WANG Hui,CHENG Lihua,OUYANG Xinping. Measurement and correlation of liquid-liquid equilibrium data for n-hexane- isopropanol azeotropic system[J]. Journal of Chemical Industry and Engineering(China), 2020, 71(7): 3009-3017. DOI: 10.11949/0438-1157.20191001 |
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| Authors: | YANG Chong LIN Xufeng ZHANG Jinfeng CHEN Hong XIAO Yepeng WANG Hui CHENG Lihua OUYANG Xinping |
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| Affiliation: | 1.College of Chemical Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, Guangdong, China;2.Guangdong Provincial Engineering Technology Research Center of Petrochemical Corrosion and Safety，Guangdong University of Petrochemical Technology, Maoming 525000, Guangdong, China;3.School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China |
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| Abstract: | To provide basic data for the process design and process simulation calculation of solvent extraction and separation of n-hexane-isopropanol mixture, experimental liquid-liquid equilibrium (LLE) data for separation of isopropanol from n-hexane were measured at 30℃ under atmospheric pressure by using dimethyl sulfoxide, 1,4-butanediol, 1,2-propanediol, acetonitrile, furfural and N,N-dimethylformamide as extractants, respectively. The extraction properties of these selected solvents were assessed by the separation factor based on the experimental LLE data. It was found that separation factor were all higher than 1 with above solvents, corroborating that it is feasible to extract isopropanol from n-hexane using the selected extractants. The consistency and reliability of the experimental data were appraised using the Hand equation, and the correlation coefficients of fitting equations were all above 0.98. Furthermore, the non-random two liquids (NRTL) activity coefficient model in Aspen Plus software was utilized to correlate the experimental tie-line compositions, in which the binary interaction parameters between the components were acquired. Subsequently, the corresponding values of phase equilibrium were calculated and compared with the experimental data. As a result, the root mean square deviation (RMSD) between the calculated and experimental compositions was below 1.0%, indicating that the NRTL model can accurately describe the liquid-liquid phase equilibrium of the ternary system. |
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| Keywords: | phase equilibria n-hexane isopropanol azeotrope solvent extraction NRTL model |
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