含正丁醚的多元组分液液相平衡研究
发布时间：2019-05-08 08:00
【摘要】：正丁醚是一种低毒性、难溶于水的含氧烃类,具有稳定性好、操作安全等优点,是一种重要的有机溶剂以及性能优良的萃取剂。液液相平衡数据在许多化学物质的的分离过程中起着至关重要的作用,也可以为工业萃取设备的设计提供重要信息;而不同温度对液液相平衡的双液相区有所影响,所以不同温度下的液液相平衡研究对于更好地理解多组分体系的热力学行为是必不可少的。精确的液液相平衡数据近年来也一直受到了很大的关注,本论文采用气相色谱仪测定了二元体系(水+正丁醚)及三元体系(水+乙醇+正丁醚)、(水+异丙醇+正丁醚)在常压及不同温度(293.15、298.15、303.15、308.15)K下的液液相平衡数据并且考察了温度对液液相平衡两相区域的影响。通过计算乙醇及异丙醇的分离系数来考察正丁醚作为萃取剂将醇从水中萃取出来的可行性。为了改善由汽车尾气引起的空气污染问题,近年来越来越多的研究致力于开发新型汽油添加剂以改善燃油品质、降低油耗、改善排放,从而达到节能减排的目的。正丁醚由于它的高辛烷值以及在水中的低溶解性,可作为一种潜在的新型汽油添加剂,本论文测得了四元体系(水+异丙醇+异辛烷+正丁醚)在298.15 K及常压下的液液相平衡数据,计算得到了四元体系中各物质的分配系数以考察当正丁醚加入模拟汽油体系,对体系有机相和水相中的各组分的影响。本论文采用Othmer-Tobias和Hand方程分析和验证了实验测得的液液相平衡数据的准确度和可靠性。对于(水+乙醇+DBE)体系Othmer-Tobias和Hand方程的回归系数(R2)平均值分别为0.9942、0.9948;对于(水+异丙醇+DBE)体系两个方程的R2平均值分别为0.9624、0.9771;对于四元体系两个方程R2平均值分别为0.9315、0.9826;说明本论文测得的液液相平衡数据的准确度和可信度均较高。同时,采用Modified UNIQUAC和Extended UNIQUAC模型分别对所测得体系的液液相平衡实验数据进行了计算分析,对于三元体系Modified和Extended UNIQUAC模型计算得到关联结果的平均均方根差分别为1.22 mol%和1.48 mol%;对于四元体系分别为1.31 mol%和2.38 mol%。计算结果表明:由模型计算得到的关联值与实验值吻合度很高。
[Abstract]:N-butyl ether is a kind of oxygen hydrocarbon with low toxicity and insoluble in water. It has the advantages of good stability and safe operation. It is an important organic solvent and extractant with good performance. Liquid-liquid equilibrium data plays an important role in the separation of many chemical substances, and it can also provide important information for the design of industrial extraction equipment. The study of liquid-liquid equilibrium at different temperatures is necessary for a better understanding of the thermodynamic behavior of multi-component systems because of the influence of different temperatures on the two-phase region of liquid-liquid equilibrium. The accurate liquid-liquid equilibrium data has been paid much attention in recent years. In this paper, the binary system (water n-butyl ether) and ternary system (water-ethanol n-butyl ether) were determined by gas chromatography. The liquid-liquid equilibrium data at atmospheric pressure and at different temperatures (293.15298.15303.15308.15) K and the effect of temperature on the liquid-liquid equilibrium two-phase region were investigated. The feasibility of extracting alcohol from water with n-butyl ether as extractant was investigated by calculating the separation coefficient of ethanol and isopropanol. In order to improve the air pollution caused by automobile exhaust, more and more research is devoted to the development of new gasoline additives to improve fuel quality, reduce fuel consumption and improve emissions, so as to achieve the purpose of energy saving and emission reduction. N-butyl ether can be used as a potential new gasoline additive because of its high octane number and low solubility in water. In this paper, the liquid-liquid equilibrium data of quaternary system (water isooctane n-butyl ether) at 298.15 K and normal pressure were measured, and the partition coefficients of each substance in the quaternary system were calculated to investigate the addition of n-butyl ether to simulated gasoline system. Influence on the components of organic phase and aqueous phase of the system. In this paper, Othmer-Tobias and Hand equations are used to analyze and verify the accuracy and reliability of the measured liquid-liquid equilibrium data. The mean regression coefficients (R2) of Othmer-Tobias and Hand equation for (water ethanol DBE) system were 0.9942 and 0.9948, respectively, and for (water isopropanol DBE) system were 0.962 24 and 0.977 1, respectively, and for (water isopropanol DBE) system, the regression coefficients (R 2) were 0.962 4 and 0.977 1, respectively. For the quaternary system, the average values of R2 are 0.9315 and 0.9826, respectively, indicating that the accuracy and reliability of the liquid-liquid equilibrium data measured in this paper are high. At the same time, Modified UNIQUAC and Extended UNIQUAC models are used to calculate and analyze the experimental data of liquid-liquid equilibrium. For the ternary system Modified and Extended UNIQUAC models, the mean root mean square deviation of the correlation results is 1.22 mol% and 1.48 mol%;, respectively. For quaternary systems, 1.31 mol% and 2.38 mol%., respectively. The calculated results show that the correlation values calculated by the model have a high degree of coincidence with the experimental values.
【学位授予单位】：暨南大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：O642.42
本文编号：2471736
[Abstract]:N-butyl ether is a kind of oxygen hydrocarbon with low toxicity and insoluble in water. It has the advantages of good stability and safe operation. It is an important organic solvent and extractant with good performance. Liquid-liquid equilibrium data plays an important role in the separation of many chemical substances, and it can also provide important information for the design of industrial extraction equipment. The study of liquid-liquid equilibrium at different temperatures is necessary for a better understanding of the thermodynamic behavior of multi-component systems because of the influence of different temperatures on the two-phase region of liquid-liquid equilibrium. The accurate liquid-liquid equilibrium data has been paid much attention in recent years. In this paper, the binary system (water n-butyl ether) and ternary system (water-ethanol n-butyl ether) were determined by gas chromatography. The liquid-liquid equilibrium data at atmospheric pressure and at different temperatures (293.15298.15303.15308.15) K and the effect of temperature on the liquid-liquid equilibrium two-phase region were investigated. The feasibility of extracting alcohol from water with n-butyl ether as extractant was investigated by calculating the separation coefficient of ethanol and isopropanol. In order to improve the air pollution caused by automobile exhaust, more and more research is devoted to the development of new gasoline additives to improve fuel quality, reduce fuel consumption and improve emissions, so as to achieve the purpose of energy saving and emission reduction. N-butyl ether can be used as a potential new gasoline additive because of its high octane number and low solubility in water. In this paper, the liquid-liquid equilibrium data of quaternary system (water isooctane n-butyl ether) at 298.15 K and normal pressure were measured, and the partition coefficients of each substance in the quaternary system were calculated to investigate the addition of n-butyl ether to simulated gasoline system. Influence on the components of organic phase and aqueous phase of the system. In this paper, Othmer-Tobias and Hand equations are used to analyze and verify the accuracy and reliability of the measured liquid-liquid equilibrium data. The mean regression coefficients (R2) of Othmer-Tobias and Hand equation for (water ethanol DBE) system were 0.9942 and 0.9948, respectively, and for (water isopropanol DBE) system were 0.962 24 and 0.977 1, respectively, and for (water isopropanol DBE) system, the regression coefficients (R 2) were 0.962 4 and 0.977 1, respectively. For the quaternary system, the average values of R2 are 0.9315 and 0.9826, respectively, indicating that the accuracy and reliability of the liquid-liquid equilibrium data measured in this paper are high. At the same time, Modified UNIQUAC and Extended UNIQUAC models are used to calculate and analyze the experimental data of liquid-liquid equilibrium. For the ternary system Modified and Extended UNIQUAC models, the mean root mean square deviation of the correlation results is 1.22 mol% and 1.48 mol%;, respectively. For quaternary systems, 1.31 mol% and 2.38 mol%., respectively. The calculated results show that the correlation values calculated by the model have a high degree of coincidence with the experimental values.
【学位授予单位】：暨南大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：O642.42
【相似文献】
相关期刊论文 前10条
1 王俊茹;高产率制备正丁醚[J];天津化工;1998年03期
2 陈珊珊;探讨提高合成正丁醚产率的方法[J];芜湖联合大学学报;1998年04期
3 陈珊珊;探讨提高合成正丁醚产率的方法[J];芜湖联合大学学报;1998年02期
4 王学兵,王燕;微型法制备正丁醚的探讨[J];黄冈师专学报;1999年03期
5 王宝丰,王俊茹,孔琳;提高正丁醚产率的方法[J];天津师大学报(自然科学版);1999年03期
6 桑国翠;戴咏川;赵德智;;微波法合成正丁醚[J];当代化工;2005年06期
7 ;在烯丙基正丁醚研制中的应用[J];北京化工大学学报(自然科学版);1976年02期
8 顾翼东,崔美芳;粉状白钨酸的研究(Ⅴ)——12-钨磷酸的直接制备以及用正丁醚的提纯法[J];高等学校化学学报;1985年08期
9 王学兵,王燕;微型法制备正丁醚的探讨[J];黄冈职业技术学院学报;1999年03期
10 秦丙昌;靳晓宁;陈永玲;李静;苗小转;;正丁醚制备实验的改进[J];化学教育;2014年02期
相关会议论文 前3条
1 段瑞林;杨林娜;张志会;;气相色谱法测己烷中微量正丁醚[A];中国化工学会2003年石油化工学术年会论文集[C];2003年
2 韩丹丹;曹海杰;李静;李明月;李鑫;何茂霞;胡敬田;;乙烯基正丁醚,异丁醚和叔丁醚在大气中的羟基化反应机理和速率常数的理论研究[A];中国化学会第29届学术年会摘要集——第15分会：理论化学方法和应用[C];2014年
3 韩丹丹;曹海杰;孙延慧;何茂霞;;乙烯基正丁醚,乙烯基异丁醚和乙烯基叔丁醚的臭氧化反应的反应机理和动力学研究[A];中国化学会第28届学术年会第2分会场摘要集[C];2012年
相关硕士学位论文 前2条
1 王翠;含正丁醚的多元组分液液相平衡研究[D];暨南大学;2016年
2 孟霞;催化精馏合成乙二醇正丁醚模拟研究[D];中国海洋大学;2012年
，本文编号：2471736
本文链接：https://www.wllwen.com/kejilunwen/huaxue/2471736.html
教材专著
