Application of NRTL and uniquac models to liquid-liquid systems with halogen salts (Part I)

Choi, Jae-Hoon; Park, Dong Won; Rhim, Jin Nam

doi:10.1007/bf02697433

Cited by 1 publication

(2 citation statements)

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“…This implicit treatment of the electrostatic energy term as a modifier of the salt-free pair interaction parameters was developed by Choi and co-workers. 100 The procedure followed to obtain the parameters from the liquid−liquid data collection was first set up by Sorensen et al 101 and lately reviewed by Tomassetti et al 102 (see also references therein), with only minor modifications.…”

Section: Data Elaborationmentioning

confidence: 99%

“…The extended electrolyte model was not used because the treatment of a quaternary mixture was judged outside the scope of this work, considering that the number of parameters that can be reliably regressed is limited by the available data. This implicit treatment of the electrostatic energy term as a modifier of the salt-free pair interaction parameters was developed by Choi and co-workers . The procedure followed to obtain the parameters from the liquid–liquid data collection was first set up by Sorensen et al and lately reviewed by Tomassetti et al (see also references therein), with only minor modifications.…”

Section: Data Elaborationmentioning

confidence: 99%

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Solid–Liquid–Liquid Equilibria of the System Water, Acetonitrile, and Ammonium Bicarbonate in Multiphase Reacting Systems

Tripodi

Conte

Robbiano

et al. 2021

Ind. Eng. Chem. Res.

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The salting out of acetonitrile from water in the presence of ammonium bicarbonate was studied at atmospheric pressure from 4 to 35 °C. The coexisting phases were analyzed independently with H1 nuclear magnetic resonance, ion chromatography, calorimetry, and titrations. The binodal region was described with semiempirical functions and with the UNIQUAC thermodynamic model. The critical composition at ambient temperature is given by 0.02 g/g of salt and 0.58 g/g of acetonitrile: at lower salt concentrations; this mixture is widely employed in liquid chromatography, thanks to the buffering properties of the bicarbonate. The separation of acetonitrile and water for extraction purposes, instead, is often obtained with other ammonium salts. These ternary equilibrium data can then be useful to develop extraction and analysis procedures at buffered, mildly alkaline pH. In addition, this mixture can be encountered during the acetonitrile synthesis proposed from bioethanol and bioethylene, so these multiphase equilibria govern the separation and purification of acetonitrile in specific reactors that allow the recovery of ammonium bicarbonate as a valuable byproduct. Furthermore, the solubility of this salt in alcohols and its decomposition were investigated to target its stability in multiphase reactors, extractors, and driers.

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Section: Data Elaborationmentioning

confidence: 99%