Experimental isobaric vapor liquid equilibrium for the ternary system of sec-butyl alcohol + sec-butyl acetate + dimethyl sulfoxide at 101.3 kPa
Introduction
sec-Butyl alcohol and sec-butyl acetate are important solvents and fine chemicals. The difference between vapor and liquid composition is nearly negligible. The mixture of sec-butyl alcohol and sec-butyl acetate is difficult to be separated by a conventional distillation process. Extractive distillation is a practical way of separating the difficult separated mixture, in which extractive agent is added to alter the vapor liquid equilibrium (VLE) of the binary system sec-butyl alcohol and sec-butyl acetate and make the separation feasible. N,N-dimethyl formamide and N,N-dimethyl acetamide were proved to be promising solvent in separation of sec-butyl alcohol and sec-butyl acetate mixture by extractive distillation in our previous work [1], [2]. Dimethyl sulfoxide (DMSO) is also indicated as a potential extractive agent for the separation of the discussed binary mixture [1], [3]. So far, only the isobaric VLE data of sec-butyl alcohol (1) + sec-butyl acetate (2) can be found in the open literature [4]. The VLE data for sec-butyl alcohol (1) + DMSO (3), sec-butyl acetate (2) + DMSO (3) and sec-butyl alcohol (1) + sec-butyl acetate (2) + DMSO (3) have not been reported in the literature. VLE data of the sec-butyl alcohol (1) + sec-butyl acetate (2) + DMSO (3) system are vital for the simulation and design of an extractive distillation process. To provide fundamental data for the separation of sec-butyl alcohol and sec-butyl acetate by extractive distillation using DMSO as extractive agent, isobaric VLE data for these systems were explored in this work.
Section snippets
Experimental chemicals
The analytical reagents from Tianjin Jiangtian Co., Ltd., China, sec-butyl alcohol, sec-butyl acetate and DMSO, were used in this work. Their molecular formula, CASRN and mass fraction are listed in Table 1. The purities of the chemicals were determined by a gas chromatograph (GC) equipped with a flame ionization detector (FID). The physical properties of the pure components are shown in Table 2. The saturated vapor pressure pis of the chemicals were calculated by the following extended Antoine
Experimental data
The reliability of the operation procedures and the experimental apparatus were confirmed in our previous work [8]. The isobaric VLE data of the binary systems sec-butyl alcohol (1) + DMSO (3), sec-butyl acetate (2) + DMSO (3) and ternary system sec-butyl alcohol (1) + sec-butyl acetate (2) + DMSO (3) were measured at 101.3 kPa with the modified Othmer still. The experimental data T, x1, y1 and calculated activity coefficients γ1, γ2 are listed in Table 4, Table 5, Table 6. The determination method of
Conclusion
The isobaric VLE data for the binary systems sec-butyl alcohol (1) + DMSO (3), sec-butyl acetate (2) + DMSO (3) and ternary system sec-butyl alcohol(1) + sec-butyl acetate (2) + DMSO (3) were measured at 101.3 kPa using a modified Othmer still. All of the binary VLE data passed the Herington test, Wisniak's L–W method and a point to point method of Van Ness test described by Fredenslund et al. And the ternary VLE data passed the Van Ness test. The isobaric VLE data of the binary systems were correlated
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Cited by (9)
Experimental isobaric vapour-liquid equilibrium data for binary systems of {sec-butyl acetate (SBAC) + acetamide} and {sec-butyl alcohol (SBA) + acetamide} and the ternary system of (SBAC + SBA + acetamide) at 101.3 kPa
2020, Journal of Chemical ThermodynamicsCitation Excerpt :Vapour-liquid equilibrium (VLE) data are fundamental in simulation and design of the extractive distillation column. Our previous work has presented the VLE data in separating SBAC and SBA by extractive distillation using N, N-dimethyl acetamide (DMAC) [22], N, N-dimethyl formamide (DMF) [23], dimethyl sulfoxide (DMSO) [24] and their binary mixture as extractive agents [25–27]. Up to now, the VLE data of the system SBAC + SBA + acetamide have not been found in the literature.
Experimental isobaric vapour-liquid equilibrium data for the binary system (N, N-dimethyl acetamide + dimethyl sulfoxide) and the quaternary system (sec-butyl acetate + sec-butyl alcohol + N, N-dimethyl acetamide + dimethyl sulfoxide) at 101.3 kPa
2019, Journal of Chemical ThermodynamicsCitation Excerpt :The Wilson, NRTL and UNIQUAC activity coefficient models with the binary parameters in Table 8 were used to predict the VLE data for the quaternary system {SBAC (1) + SBA (2) + DMAC (3) + DMSO (4)}. All the binary interaction parameters in Table 8 except those of the binary system {DMAC (3) + DMSO (4)} were from the published work [4,13,22]. The maximum absolute deviations, mean absolute deviations and standard deviations are listed in Tables 10–12.
Vapor-liquid interface properties of diethyl sulfoxide-water and ethyl methyl sulfoxide-water mixtures: Molecular dynamics simulations and quantum-chemical calculations
2016, Fluid Phase EquilibriaCitation Excerpt :Experimental evidence at the laboratory level exists that cryoprotective performance of DESO is better than that of dimethyl suphoxide (DMSO) [1]. While DMSO continues to be widely applied in medicine, biology, and organic synthesis as one of the major polar aprotic solvents [7–19], emergence of new sulfoxides may, to some extent, substitute DMSO. DMSO exhibits low toxicity to animals, including human beings.
Experimental isobaric (vapor + liquid) equilibrium data for the binary system N, N-dimethyl formamide + dimethyl sulfoxide and the quaternary system sec-butyl alcohol + sec-butyl acetate + N, N-dimethyl formamide + dimethyl sulfoxide at 101.3 kPa
2016, Fluid Phase EquilibriaCitation Excerpt :And Extractive agent selection is important aspect for a process of extractive distillation. In our previous work, DMF (3) and DMSO (4) were certified to be effective extractive solvents for separation of sec-butyl alcohol (1) and sec-butyl acetate (2) and DMSO performed better than DMF [5,6]. But the boiling point of DMSO is so high that it is likely to decompose when recovering extractive agent by distillation at 1 atm and even can cause explosion.