常压下环己烯-环氧环己烷-环己酮三元系汽液平衡的测定、预测及关联

H2O2氧化环己烯制备环氧环己烷时会产生环己酮等副产物,同时还有未反应完的环己烯。为了获得较纯的环氧环己烷需采用精馏将副产物和环己烯分离出来,精馏提纯需要相关体系的汽液平衡数据,因此采用改进的EC-2汽液平衡釜测定常压(101.33k Pa)下环己烯-环氧环己烷-环己酮三元体系汽液平衡数据。利用二元系汽液平衡数据拟合得到的Wilson方程配偶参数预测该三元体系的汽液平衡数据,并以汽相组成的误差平方和作为目标函数,用Wilson方程关联实验数据,结果表明预测值及关联值与实验值偏差较小,可满足工程上分离设计的需要。     

常压下环己烷-环氧环己烷二元体系汽液平衡研究

合成环氧环己烷的反应液中常含有环己烷,为获得高纯度的环氧环己烷产品,可采用精馏方法进行分离。而精馏设计计算需要环氧环己烷-环己烷二元体系汽液平衡数据,为此用改进的Rose汽液平衡釜在常压(101.3 kPa)下测定该二元体系的汽液平衡数据,并对所测得的数据进行热力学一致性检验,结果表明实验数据符合热力学一致性。以汽相组成的误差平方和作为目标函数,分别用Wilson方程和NRTL方程关联实验数据,得到分子交互作用能量参数,并对汽液平衡计算值与实验值进行比较,发现二者偏差较小,可以满足工程上分离设计的需要。     

常压下环己烯-环己酮二元体系汽液平衡研究

H2O2氧化环己烯合成环氧环己烷有很多副产物生成,如环己酮、环己醇等,为了获得较纯的环氧环己烷需采用精馏提纯的方法将副产物分离出来.而精馏提纯需要相关体系的汽液平衡数据,为此用改进的Rose汽液平衡釜测定常压下环己烯-环己酮二元体系汽液平衡数据,并对数据进行热力学一致性检验,结果表明实验数据符合热力学一致性.以汽相组成...     

常压下环氧环己烷-环己酮-环己醇三元系汽液平衡

H2O2氧化环己烯制备环氧环己烷时有环己酮、环己醇等很多副产物产生。为了获得较纯的环氧环己烷需采用精馏进行分离,精馏提纯需要相关体系的汽液平衡数据,因此采用改进的EC-2汽液平衡釜测定常压(101.33 k Pa)下环己酮-环己醇二元体系和环氧环己烷-环己酮-环己醇三元体系汽液平衡数据。利用二元系汽液平衡数据拟合得到的Wilson方程配偶参数预测该三元体系的汽液平衡数据,并以汽相组成的误差平方和作为目标函数,用Wilson方程关联实验数据,结果表明预测值及关联值与实验值偏差较小,可满足工程上分离设计的需要。     

环己烯、1,2-环氧环己烷和2-环己烯-1-酮二元和三元系的等压汽液平衡

作者采用改进的EC-2型汽液平衡釜测定了常压下(101.33kPa)环己烯、1,2-环氧环己烷、2-环己烯-1-酮3组二元系和1组三元系的等压汽液平衡(VLE)数据。对二元的等压汽液平衡实验数据作了热力学一致性检验和Wilson方程关联,求出了相应的Wilson方程配偶参数,用求得的参数推算了相应二元及三元系的VLE数据,并将其与实验值进行了比较,结果令人满意,可以满足工程上环己烯与其氧化产物分离设计的需要。     

四氢呋喃-环己烷二元物系常压汽液平衡数据的测定和关联

为了常压分离四氢呋喃-环己烷二元物系,利用CE-2型汽液平衡装置测定了四氢呋喃-环己烷二元物系的常压(100 k Pa)汽液平衡数据。实验结果表明:四氢呋喃和环己烷形成最低共沸物。实验汽液平衡数据通过了Herington半经验法热力学一致性校验。通过Margules,Van Laar,Wilson和NRTL活度系数模型对实验数据进行关联和估算,得到了模型的参数值。对模型计算值和实验值进行比较得到汽相摩尔分数和泡点温度的最大绝对平均偏差。通过比较可以看出,Vanlaar和Wilson活度系数模型更适合于四氢呋喃(1)-环己烷(2)二元体系汽液平衡数据的关联。     

环戊烷-四氢呋喃-环己烷三元体系汽液平衡的测定

在常压（101．3kPa）下,用汽液平衡釜测定了环戊烷．四氢呋喃一环己烷三元体系的汽液平衡,所得的汽液平衡数据符合热力学一致性检验,采用改进的UNIFAC方程和Wilson方程对试验数据进行了关联,试验结果与计算结果吻合较好。     

环己烷-乙烯基降冰片烯体系汽液平衡数据测定及关联

采用改进的Rose汽液平衡釜,测定了在12.0kPa压力下的乙烯基降冰片烯精馏体系中环己烷(CH)-乙烯基环己烯（VCH）,环己烷(CH)-乙烯基降冰片烯(VNB),环己烷(CH)-四氢茚(THI)的汽液平衡数据,并进行了热力学一致性验证,由所测数据回归出三组用于该体系Wilson方程的配偶参数,并证明了Wilson方程可以较好地关联环己烷-乙烯基降冰片烯体系的汽液平衡.为乙烯基降冰片烯精馏体系的开发与设计提供了基础数据.     

常压下正丁醇-异丁醇-醋酸丁酯-水体系汽液平衡测定与关联

文章采用单级循环汽液平衡釜测定了常压条件下正丁醇-异丁醇-醋酸丁酯-水混合液中的二元体系的汽液平衡数据,运用试差法关联Wilson方程中六对二元体系的模型参数,并计算出相应的汽相组成;测定了常压条件下正丁醇-异丁醇-醋酸丁酯-水四元体系的汽液平衡数据,并由六对二元体系模型参数关联出四元体系的汽液平衡数据。比较实验和计算值,结果表明:实验值与计算值的相对偏差均≤5%,说明实验值与计算值一致。文章研究结果为正丁醇、异丁醇、醋酸丁酯及水混合液的分离提供了一定基础数据。     

乙二醇-1,2-丁二醇二元体系汽液平衡数据的测定及关联

为解决合成气经由草酸酯制乙二醇反应过程中产生的副产物1,2-丁二醇与乙二醇的分离问题,利用改进的Ellis汽液平衡釜测定了乙二醇-1,2丁二醇二元体系常压下汽液平衡数据,并通过Herington规则验证了实验结果符合热力学一致性。分别用Wilson和NRTL模型对实验数据进行热力学关联,得到了相关的模型参数并计算了该二元体系不同摩尔分数2种组分的活度系数值,预测了该二元体系的共沸点组成(摩尔分数)为乙二醇47.0%,1,2-丁二醇53.0%,共沸点温度为465.91 K。汽相组成的计算值与实验值平均相对偏差均小于0.2%,说明2种模型均适用于该二元体系,为工业分离工艺的设计提供了参考。     

Measurement and Correlation of Vapor-Liquid Equilibrium for Binary System 1,2-Epoxycyclohexane+1,2-Dichloroethane

Vapor-liquid equilibrium data (T, x, y) of binary system 1,2-epoxycyclohexane+1,2-dichloroethane were determined experimentally by using a modified ROSE-Williams equilibrium vaporization system at 101....     

1,2-环氧环己烷和1,2-二氯乙烷二元体系汽液平衡数据的测定与关联(英文)

Vapor-liquid equilibrium data (T, x, y) of binary system 1,2-epoxycyclohexane + 1,2-dichloroethane were determined experimentally by using a modified ROSE-Williams equilibrium vaporization system at 101.33 kPa. The results show that this binary system does not have azeotropic point. The vapor-liquid equilibrium data are in thermodynamic consistency. The binary interaction parameters in the Wilson equation are presented with the correlation of vapor-liquid equilibrium data. The measurements of liquid phase composition and bubble point temperature are well represented by the Wilson equation. Values of vapor molecular fractions and activity coefficients from the Wilson equation are presented. This work provides important engineering data for the separation of 1,2-dichloroethane and 1,2-epoxycyclohexane .     

101.3 kPa 下环氧环己烷-环己酮气液平衡的测定及关联简

Many by-products are generated in the process of oxidizing cyclohexene to produce 1,2-epoxycyclohexane by hydrogen peroxide, including cyclohexanol, cyclohexanone, etc. To obtain high-purity 1,2-epoxycyclohexane, the by-products must be removed through rectification. Refining 1,2-epoxycyclohexane through rectification requires vapor-liquid equilibrium （VLE） data of the related system. Therefore, the VLE data of 1,2-epoxycyclohexane- cyclohexanone system were measured at 101.3 kPa using an improved EC-2 VLE still. The thermodynamic consistency of the data was then tested by Herington＇s method and the rigorous point-to-point method. The results obtained were exemplary. The VLE data were correlated by the Wilson and non-random two-liquid （NRTL） equations, using the error sum squares of the vapor composition as the objective function to obtain the model parameters. The difference between the calculated values and the experimental data is minor, indicating that the VLE data are suitable for engineering design.     

1,2-环氧环己烷与2-环己烯-1-酮的等压汽液平衡

Green oxidation of cyclohexene using dioxygen as oxidizing agent is highly desirable because of its environmental compatibility and economic impact. Separation of its oxidation products depends on the reliable vapor- liquid equilibrium (VLE) data of relevant components, which are still lacking. The VLE data of binary system 1,2-epoxycyclohexane and 2-cyclohexen-1-one under ambient pressure were obtained using an improved VLE equipment EC-2 still in this work. The results showed that this binary system has no azeotropic point. Furthermore, the experimental VLE data were correlated with the Wilson thermodynamic model and the corresponding binary interaction parameters of the model were obtained. The results showed that the VLE data agreed well with the model and passed the thermodynamic consistency test of Herrington.     

蒎烷饱和蒸汽压的测定与关联

采用改进的Ellis平衡釜和毛细管气相色谱分析方法，测定了常压及在绝对压力59．34～93．93kPa、温度421．23-441．06K条件下高浓度蒎烷体系的汽液平衡数据。根据稀溶液的溶剂符合Raoult定律的规则，由Raoult定律计算出上述实验温度下蒎烷和顺式蒎烷的饱和蒸汽压，然后使用FVIEWS数理统计软件回归出Antoine方程的A、B、C参数分别为：蒎烷9．299577，325．7533，-319．4974：顺式蒎烷9．27180l，321．8889，-319．400，从而建立了蒎烷和顺式蒎烷的饱和蒸汽压与温度的关联式。其计算蒸汽压的相对误差范围为0．046％-0．18％，并用对应态基团贡献法估算了蒎烷的蒸汽压，相对误差为1．4％。     

常压下环己烯-环己醇汽液平衡的测定和关联

Many by-products are generated in the process of oxidizing cyclohexene to produce 1,2-epoxycyclohexane by hydrogen peroxide,including cyclohexanol,cyclohexanone,etc.To obtain high-purity 1,2-epoxycyclohexane, the by-products and unreacted cyclohexene must be removed through rectification,in which the vapor-liquid equilibrium(VLE)data of the system are needed.In this study,the VLE data of cyclohexene-cyclohexanol system were studied at 101.3 kPa using an improved EC-2 VLE still.The thermodynamic consistency of the data was examined by Herington’s method.The results obtained were exemplary.The VLE data were correlated by the Wilson equation. The difference between the calculated values and the experimental data is minor,indicating that the VLE data are suitable for engineering design.     

乙二醇-1,4-丁二醇二元物系6.67kPa下汽液平衡研究

煤制乙二醇过程中产生的副产物1,4-丁二醇对获得高纯度的乙二醇有着重要影响。采用真空精馏方法分离提纯,进行设计计算时,需要乙二醇-1,4-丁二醇汽液平衡数据。为此在6.67 k Pa压力下测定了乙二醇-1,4-丁二醇的汽液相平衡数据,并进行了热力学一致性检验,结果表明实验数据符合热力学一致性。分别用Wilson和NRTL模型对实验数据进行关联,发现两个模型误差都不大,均可满足工程设计的需要。     

氢化松节油体系汽液相平衡数据的测定与关联

氢化松节油的主要成分是蒎烷和α 蒎烯 ,采用改进了的Eills平衡釜测定常压下蒎烷 α 蒎烯体系的汽液相平衡数据 ,实验数据符合热力学一致性。同时 ,分别用理想模型、VanLaar模型、Wilson模型对实验数据进行了关联 ,Wilson模型的计算结果与实测结果偏差最小     

乙醇-水体系汽液平衡数据的测定与关联

用鼓泡平衡釜测定了乙醇-水系统在常压下的汽液平衡数据,用Wilson方程关联实验数据,实验数据计算值和测定值能较好的符合并得到了乙醇—水的模型参数,汽相组成平均偏差为-0.146(摩尔分数)。此外,还讨论了加入萃取剂对乙醇-水系统汽液平衡的影响。