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Chemical equilibrium and liquid–liquid equilibrium in ternary mixtures of formaldehyde, water, and isobutanol/ n-butanol between 295 K and 348 K.

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Title: Chemical equilibrium and liquid–liquid equilibrium in ternary mixtures of formaldehyde, water, and isobutanol/ n-butanol between 295 K and 348 K.
Authors: Winklbauer, Lukas1 (AUTHOR), Burger, Jakob1 (AUTHOR) burger@tum.de
Source: Fluid Phase Equilibria. Jul2025, Vol. 594, pN.PAG-N.PAG. 1p.
Subjects: Chemical equilibrium, Nuclear magnetic resonance, Phase equilibrium, Nuclear magnetic resonance spectroscopy, Species distribution, Butanol, Isobutanol
Abstract: Mixtures of formaldehyde, water, and isobutanol/ n-butanol exhibit a ternary liquid–liquid equilibrium, as water and butanol are only partially miscible. In the present work, we study the chemical and liquid–liquid equilibria of the systems (formaldehyde + water + isobutanol) and (formaldehyde + water + n-butanol). The species distributions in the chemical equilibrium of both systems are measured between 298 K and 348 K using nuclear magnetic resonance (NMR) spectroscopy. Ternary liquid–liquid equilibrium data are reported between 295 K and 324 K. The experimental data is used to develop a model of the reactive liquid–liquid equilibria for mixtures of formaldehyde, water, and isobutanol/n-butanol. • Research on the reactive LLE of mixtures of formaldehyde, water, and isobutanol/ n-butanol. • Chemical equilibrium of oligomer formation investigated between 298 K and 348 K using NMR spectroscopy. • Ternary LLE measurements between 295 K and 324 K. • Development of UNIFAC-based phase equilibrium model. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Mixtures of formaldehyde, water, and isobutanol/ n-butanol exhibit a ternary liquid–liquid equilibrium, as water and butanol are only partially miscible. In the present work, we study the chemical and liquid–liquid equilibria of the systems (formaldehyde + water + isobutanol) and (formaldehyde + water + n-butanol). The species distributions in the chemical equilibrium of both systems are measured between 298 K and 348 K using nuclear magnetic resonance (NMR) spectroscopy. Ternary liquid–liquid equilibrium data are reported between 295 K and 324 K. The experimental data is used to develop a model of the reactive liquid–liquid equilibria for mixtures of formaldehyde, water, and isobutanol/n-butanol. • Research on the reactive LLE of mixtures of formaldehyde, water, and isobutanol/ n-butanol. • Chemical equilibrium of oligomer formation investigated between 298 K and 348 K using NMR spectroscopy. • Ternary LLE measurements between 295 K and 324 K. • Development of UNIFAC-based phase equilibrium model. [ABSTRACT FROM AUTHOR]
ISSN:03783812
DOI:10.1016/j.fluid.2025.114364