Measurement and Correlation of Vapor-Liquid Equilibrium of the 1,2-Epoxycyclohexane-Cyclohexanone Binary System at 101.3 kPa

doi:10.1016/S1004-9541(14)60042-2

Chinese Journal of Chemical Engineering ›› 2014, Vol. 22 ›› Issue (3): 355-359.DOI: 10.1016/S1004-9541(14)60042-2

Measurement and Correlation of Vapor-Liquid Equilibrium of the 1,2-Epoxycyclohexane-Cyclohexanone Binary System at 101.3 kPa

王训遒¹, 庄新亮^1,2, 蒋登高¹

1 School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, China;
2 Wanhua Chemical Group Co., Ltd., Yantai 264002, China

收稿日期:2012-03-01 修回日期:2012-09-20 出版日期:2014-03-28 发布日期:2014-03-05
通讯作者: WANG Xunqiu
基金资助:
Supported by the Key Scientific and Technology Project of Henan Province (132102210050).

Measurement and Correlation of Vapor-Liquid Equilibrium of the 1,2-Epoxycyclohexane-Cyclohexanone Binary System at 101.3 kPa

WANG Xunqiu¹, ZHUANG Xinliang^1,2, JIANG Denggao¹

1 School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, China;
2 Wanhua Chemical Group Co., Ltd., Yantai 264002, China

Received:2012-03-01 Revised:2012-09-20 Online:2014-03-28 Published:2014-03-05
Contact: WANG Xunqiu
Supported by:
Supported by the Key Scientific and Technology Project of Henan Province (132102210050).

摘要/Abstract

摘要： 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.

关键词: vapor-liquid equilibrium, 1,2-epoxycyclohexane, cyclohexanone, Wilson equation, NRTL equation

Abstract: 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.

Key words: vapor-liquid equilibrium, 1,2-epoxycyclohexane, cyclohexanone, Wilson equation, NRTL equation

王训遒, 庄新亮, 蒋登高. Measurement and Correlation of Vapor-Liquid Equilibrium of the 1,2-Epoxycyclohexane-Cyclohexanone Binary System at 101.3 kPa[J]. Chinese Journal of Chemical Engineering, 2014, 22(3): 355-359.

WANG Xunqiu, ZHUANG Xinliang, JIANG Denggao. Measurement and Correlation of Vapor-Liquid Equilibrium of the 1,2-Epoxycyclohexane-Cyclohexanone Binary System at 101.3 kPa[J]. Chin.J.Chem.Eng., 2014, 22(3): 355-359.

参考文献

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Measurement and Correlation of Vapor-Liquid Equilibrium of the 1,2-Epoxycyclohexane-Cyclohexanone Binary System at 101.3 kPa

Measurement and Correlation of Vapor-Liquid Equilibrium of the 1,2-Epoxycyclohexane-Cyclohexanone Binary System at 101.3 kPa

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