Thermophysical properties and isobaric vapor-liquid equilibria for 3,4-difluoronitrobenzene and 2,5-difluoronitrobenzene

IF 2.8 3区工程技术 Q3 CHEMISTRY, PHYSICAL

Fluid Phase Equilibria Pub Date : 2025-01-17 DOI:10.1016/j.fluid.2025.114341

Xueqiang Shao , Shucui Han , Lin Lin , Jinyi Chen , Jinbei Yang

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引用次数: 0

Abstract

3,4-Difluoronitrobenzene and 2,5-difluoronitrobenzene are significant fine chemical intermediates, widely applied in the fields of medicine, pesticides, and liquid crystal materials, particularly in pharmaceutical production. The available literature on their thermodynamic properties is scarce. Thermophysical property measurements for pure 3,4-difluoronitrobenzene and 2,5-difluoronitrobenzene liquids were performed in relation to temperature: density (293.15 to 353.15) K, viscosity (293.15 to 353.15) K, saturated vapor pressure (366 to 478) K. Isobaric vapor-liquid equilibria (VLE) data for the 3,4-difluoronitrobenzene and 2,5-difluoronitrobenzene binary system were experimentally determined at 101.2 kPa. The correspondence between density and temperature was successfully modeled utilizing the DIPPR equation. Meanwhile, viscosity data were analyzed using four selected equations, with VFT equation yielding the most precise results. Furthermore, the correlation between saturated vapor pressure and temperature can be precisely established using Antoine and Riedel equations. The binary VLE data were modeled using NRTL and Wilson equations, yielding binary interaction parameters. These parameter-derived predictions closely aligned with experimental findings, revealing the absence of azeotropic behavior in the binary system. The thermophysical properties of these pure components, along with VLE data provided, are significant for the separation process of 3,4-difluoronitrobenzene and 2,5-difluoronitrobenzene.

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来源期刊

Fluid Phase Equilibria 工程技术-工程：化工

CiteScore

5.30

自引率

15.40%

发文量

223

审稿时长

53 days

期刊介绍： Fluid Phase Equilibria publishes high-quality papers dealing with experimental, theoretical, and applied research related to equilibrium and transport properties of fluids, solids, and interfaces. Subjects of interest include physical/phase and chemical equilibria; equilibrium and nonequilibrium thermophysical properties; fundamental thermodynamic relations; and stability. The systems central to the journal include pure substances and mixtures of organic and inorganic materials, including polymers, biochemicals, and surfactants with sufficient characterization of composition and purity for the results to be reproduced. Alloys are of interest only when thermodynamic studies are included, purely material studies will not be considered. In all cases, authors are expected to provide physical or chemical interpretations of the results. Experimental research can include measurements under all conditions of temperature, pressure, and composition, including critical and supercritical. Measurements are to be associated with systems and conditions of fundamental or applied interest, and may not be only a collection of routine data, such as physical property or solubility measurements at limited pressures and temperatures close to ambient, or surfactant studies focussed strictly on micellisation or micelle structure. Papers reporting common data must be accompanied by new physical insights and/or contemporary or new theory or techniques.