Vapor Pressure Measurement and Isobaric Vapor–Liquid Equilibria for Binary Mixtures of <i>ZE</i>-2-Methyl-2-butenenitrile and 2-Methyl-3-butenenitrile

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The isobaric (vapor + liquid) equilibrium (VLE) at 100.0 kPa data of two binary mixtures (3-cyano-1butene + RS-4-vinyl-1-cyclohexene) and (3-cyano-1-butene + ZE-1-cyano-2-butene), and the isothermal (vapor + liquid) equilibrium at (373.15, 383.15 and 403.15) K data of (RS-4vinyl-1-cyclohexene + ZE-1-cyano-2-butene) have been determined. These VLE data were checked with both pointto-point test and direct test, and they proved to be thermodynamically consistent. Further the (vapor + liquid) equilibrium data were correlated by two local composition models (Wilson + NRTL), and the interaction energy parameters of the models were optimized by least-squares. All calculated and experimental values show a very good agreement and consistency.

Section: Resultsmentioning

confidence: 99%

“… a The Antoine coefficients of 3-cyano-1-butene were referenced in ref , and the average relative deviation in pressure (ARDP) was 0.907%. …”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Vapor–Liquid Equilibrium for Binary Mixtures of 3-Cyano-1-butene + RS-4-Vinyl-1-cyclohexene, 3-Cyano-1-butene + ZE-1-Cyano-2-butene and RS-4-Vinyl-1-cyclohexene + ZE-1-Cyano-2-butene

Wang

Luo

et al. 2018

Self Cite

“…The VLE data used in the production process of adiponitrile were measured partly. In the production of adiponitrile from the butadiene method, the VLE data of 2-methyl-2-butenenitrile and 2-methyl-3-butenenitrile at 50 and 100 kPa were measured; 4 further, the VLE data of 2-methyl-2-butenenitrile and 3pentenenitrile and 2-methyl-3-butenenitrile and 3-pentenenitrile at 50 and 100 kPa were measured. 5,6 Other VLE data of the mid-product and the byproduct in this method and VLE data for other production methods are not available.…”

Section: Introductionmentioning

confidence: 99%

Isobaric Vapor–Liquid Equilibria for the Binary System of Adiponitrile and Cyclopentanone at 5 and 10 kPa

Jiang

Wei

et al. 2021

The isobaric vapor–liquid equilibrium (VLE) data for the binary system of adiponitrile + cyclopentanone at 5 and 10 kPa were determined with a modified Rose–Williams still. The reliability of the apparatus was verified by the measurements of the vapor pressure of cyclopentanone and water at varying temperatures. The thermodynamic consistency of VLE data was tested by methods suggested by Wisniak and Van Ness. Five activity coefficient models, including van Laar, Margules, Wilson, NRTL, and UNIQUAC models, were used to correlate the VLE data, and the excess Gibbs free energy of the binary system was determined. The parameters of the five activity coefficient models were obtained using the experimental data, and the regression results were evaluated by RMST (defined by eq 12) and RMSy 1 (defined by eq 13). The results show that the deviation of temperature calculated by the Margules model is larger than those calculated by other models, and the Wilson, NRTL, and UNIQUAC models are all acceptable for this system. Furthermore, the UNIQUAC model shows the best prediction accuracy among these models with RMST and RMSy 1 less than 1.2 and 0.007, respectively.

Isobaric Vapor–Liquid Equilibria for Binary Mixtures of Adiponitrile + 2-Methylglutaronitrile and Adiponitrile + Trans-3-pentenenitrile at 5 kPa and 10 kPa

Guo

Jiang

et al. 2022

The isobaric vapor−liquid equilibria (VLE) of two binary mixtures (adiponitrile + 2-methylglutaronitrile and adiponitrile + trans-3-pentenenitrile) at 5 and 10 kPa were measured using a modified Rose−Williams still. The thermodynamic consistency of the VLE data was tested by the Wisniak method and the Fredenslund method. The isobaric VLE data were correlated with four activity coefficient models of Margules, van Laar, Wilson, and NRTL, and the parameters of the models were obtained by the ordinary least-squares method. The isobaric VLE data were compared with the original UNIFAC predictive model. Furthermore, the excess Gibbs free energy of studied mixtures was determined. The RMST and RMSy 1 were determined to evaluate the regression results. The results show that the Wilson model has a better correlation effect than other models.