C_8芳烃异构体+异丙醇体系在333.15K时的过量摩尔Gibbs自由能

采用CP-I型汽液平衡双循环釜,测定了333.15 K时乙苯+异丙醇、邻二甲苯+异丙醇、间二甲苯+异丙醇、对二甲苯+异丙醇四个体系的汽液平衡数据,计算了该温度下四个体系的过量摩尔Gibbs自由能,并对所测数据进行了恒温下热力学一致性检验。用Wilson方程关联了实验数据,拟合精度令人满意。     

若干酮—醇体系的汽液平衡

本文用流动汽液平衡釜测定了戊酮－３－正丙醇丁酮－戊醇－１－两个体系三个温度下的等温液平衡数据，三个温度下的数据均通过热力学一致性检验，并用Ｗｉｌｓｏｎ方程和ＵＮＩ－ＱＵＡＣ方程对数据进行了关联，平均汽相偏差小于０．０１，精度令人满意。     

多功能汽液平衡测定仪的研究

研制了一种多功能液平衡测定仪－－CS-Ⅱ型VLE测定仪，阐述了该仪器的设计思想，该仪器兼有沸点仪和平衡釜的特点和功能，作为沸点仪，它具有泵结构搅拌器，可适用于拟静态法；作为平衡釜,它具有新型的汽液相取样结构和液相区冷却功能，可适用于安全互溶体系、部分互溶体系和高沸点差体系VLE的测定，本文给出了有关详细的实验考核结果。     

若干酮－醇体系的汽液平衡

本文用流动汽液平衡釜测定了①戊酮－３－正丙醇③丁酮－戊醇－１两个体系三个温度下的等温汽液平衡数据，三个温度下的数据均通过热力学一致性检验，并用Ｗｉｌｓｏｎ方程和ＵＮＩ－ＱＵＡＣ方程对数据进行了关联，平均汽相偏差小于０．０１，精度令人满意。     

含盐体系汽液平衡的测定方法和测定仪器的研究

针对含盐体系汽液平衡测定的特点及常用测定仪器和方法中的问题，改制了具有沸点仪和双循环平衡釜双重功能CS－Ⅱ型VLE测定仪，并以拟表态法测定了含盐体系汽液平衡的泡点线和平衡液相恒盐浓度下的露点线，新测定仪能避免用双循环仪器时极易出现的流动不稳定性和爆沸现象，成功地测定了氯化钙平衡液相浓度为5％的CaCl2-丙酮（1）－甲醇（2）体系的汽液平衡数据。     

甲酸—乙酸—水—氯化镁体系汽液平衡中的盐效应

采用Otsuiki-Williams式汽液平衡仪在9.866×10~4Pa下测定了甲酸-水、乙酸-水、甲酸-乙酸、甲酸-乙酸-水体系无盐和加氯化镁后各体系的汽液平衡数据,绘制了两组分和三组分体系相图。相图表明氯化镁有明显的盐效应。     

三元无限稀释活度系数的实验测定

三元无限稀释活度系数的实验测定鲍坚斌，周秋红，李昂，韩世钧（浙江大学化学系，杭州，３１００２７）关键词三元无限稀释活度系数，气提法，汽液平衡，液液平衡传统的无限稀释活度系数一般是指二元无限稀释活度系数，即（ｉ为无限稀释单组分溶质，ｊ为单组分溶剂），它...     

甲酸—乙酸—水—氯化钙体系汽液平衡盐效应（Ⅱ）

研究了加入恒定浓度分别为0.8和1.0 mol/(kg溶剂)的氯化钙的甲酸-乙酸-水体系的汽液平衡盐效应以及盐浓度对体系汽液平衡盐效应的影响。用汽液相等浓线及所划分的区域和等挥发度线分析判别了盐浓度对盐效应的影响以及由此引起的各区域挥发度的变化情况。结果表明,氯化钙对甲酸、乙酸的盐析效应随盐浓度增加而增强。     

Isobaric Vapor-Liquid Equilibrium of t-Butyl Alcohol-Cyclohexanol System

The isobaric vapor-liquid equilibrium data of t-butyl alcohol (1)-cyclohexanol (2) were determined at 0.7 bar and 1.0 bar by using a modified Rose-Williams still. The experimental data were tested for thermodynamic consistency and correlated satisfactorily with Margules equation and NRTL equation.     

Studies on Isothermal Vapor-Liquid Equilibrium for Styrene-Cumene Binary System

This dissertation has studied the isothermal vapor-liquid equilibrium(VLE) in associating system of styrene-cumene at 353.15K and 373.15K by using a modified Rose still. The pressures are indirectly measured from the boiling points of pure waler in a separate inclined cbulliometer with a pump-like stirrer. The experimental data are well correlated with Wilson equation.     

Isobaric Vapor-Liquid Equilibria and Densities for the System Ethyl 1,1-Dimethylethyl Ether + 2-Propanol

Vapor-liquid equilibrium (VLE) data at 50, 75, and 94 kPa have been determined for the binary system ethyl 1,1-dimethylethyl ether + 2-propanol, in the temperature range 323-344 K. The measurements were made in an equilibrium still with circulation of both the vapor and liquid phases. Excess volumes have been also determined from density measurements at 298.15 K. The system exhibits positive deviation from ideal behavior and azeotropic behavior in the range of experimental pressures. The excess volume of the system is negative over the whole mole fraction range. The activity coefficients and boiling points of the solutions were well correlated with the mole fraction by the Wohl, Wilson, UNIQUAC, NRTL equations and predicted by the UNIFAC group contribution method. Excess volume data were correlated using the Redlich-Kister expansion.     

New Thermodynamic Consistency Test for Isobaric Vapour-Liquid Equilibrium Data

A thermodynamic consistency test for the vapour-liquid equilibrium data obtained under isobaric conditions is proposed. According to this procedure, the coexistence equation with correction term for the nonideality of the vapour phase was used. The differential equation has two singulier points and was solved by numerical integration according to the method predictor-corrector Adams combined with the classical Runge-Kutta method. The nonideality of the vapour phase is considered by using the second coefficients from the virial equation of state. The residuals of the vapour phase obtained as differences between the calculated, respectively experimental values were statistically analysed to detect systematic and random errors. In this order Student and Abbe tests were used. A study of the influence of the method and the step of the integration is also presented. In this order Runge-Kutta and Adams methods were compared and for the estimation of the second virial coefficients different published procedures have been taken into account. In this paper the method of Tsonopoulos and Hayden - O'Connell are taken into account. A correlation analysis is performed to evaluate the results of this study. This revised version was published online in July 2006 with corrections to the Cover Date.     

Isobaric Vapor-Liquid Equilibria in the Systems Ethyl 1,1-Dimethylethyl Ether + Hexane and + Heptane

Abstract

Pure-component vapor pressure of ethyl 1,1-dimethylethyl ether and vapor-liquid equilibrium for the binary systems of ETBE with hexane and with heptane have been measured at 94kPa. Both systems deviate slightly from ideal behavior, can be described as regular solutions and do no present an azeotrope. The activity coefficients and boiling points of the solutions were correlated with its composition by the Redlich-Kister, Wohl, Wilson, UNIQUAC, NRTL, and Wisniak-Tamir equations.     

Isobaric Vapor-Liquid Equilibria and Densities for the Binary Systems Oxolane + Ethyl 1,1-Dimethylethyl Ether,Oxolane + 2-Propanol and Propan-2-One + Trichloromethane

Vapor-liquid equilibrium data have been determined at 50 kPa for the binary systems oxolane (THF) + ethyl 1,1-dimethylethyl ether (ETBE) and oxolane + 2-propanol, and at 94 kPa for the system propan-2-one + trichloromethane. Excess volumes have also been determined from density measurements at 298.15 K. The systems oxolane + ethyl 1,1-dimethylethyl ether and oxolane + 2-propanol exhibit slight to moderate positive deviations from ideal behavior and no azeotrope is present. The system propan-2-one + trichloromethane exhibits negative deviations from ideal behavior and presents an azeotrope. The excess volumes of the system oxolane + ethyl 1,1-dimethylethyl ether are negative over the whole mole fraction range while those of the system oxolane + 2-propanol are positive. Excess volumes of the system propan-2-one + trichloromethane, change from negative to positive as the concentration of propan-2-one increases. The activity coefficients and boiling points of the solutions were correlated with the mole fraction by the Wohl, Wilson, UNIQUAC, and NRTL equations, and predicted by the UNIFAC group contribution method. Excess volume data were correlated using the Redlich-Kister expansion. The chemical association theory was applied for explaining the equilibrium behavior of the systems oxolane + 2-propanol and propan-2-one + trichloromethane.     

双液系气液平衡相图实验沸点仪的改进——基于化学实验教学EHS理念的考虑

基于EHS（Environment-Health-Safety）理念的考虑,对双液系气液平衡相图实验沸点仪作了相应改进。改进后的实验装置在保持原有装置操作方便、测量准确的基础上,能够更好地满足在化学实验教学中贯彻EHS理念的要求。     

Vapor-Liquid Equilibrium Data of Carbon Dioxide+Methyl Propionate and Carbon Dioxide+Propyl Propionate Systems

High-pressure vapor-liquid equilibrium data for the binary systems of methyl propi-onate+carbon dioxide and propyl propionate+carbon dioxide were measured at pressure from 1.00 MPa to 12.00 MPa and temperature in the range from 313 K to 373 K. Experimen-tal results were correlated with the Peng-Robinson equation of state with the two-parameter van der Waals mixing rule. At the same time, the Henry's coefficient, partial molar enthalpy change and partial molar entropy change of CO₂ during dissolution at different temperature were also calculated.     

二氧化碳和碳酸二甲酯二元体系的气液相平衡数据

实验测定了二氧化碳和碳酸二甲酯(DMC)二元体系的高压气液相平衡数据. 实验温度为333.0 到393.0 K, 实验压力为3.98 到13.75 MPa. 应用Peng-Robison (PR)立方形状态方程和van der Waals-1 混合规则对实验数据进行了关联计算, 同时得到了二元相互作用参数. 计算结果与实验数据具有很好的一致性.