Extractive crystallization of salts from concentrated aqueous solution

Weingaertner, D. A.; Lynn, Scott; Hanson, Donald N.

doi:10.1021/ie00051a009

Cited by 83 publications

(54 citation statements)

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“…Liquid-liquid equilibria for ternary systems containing one salt and two solvents are of particular interest for the recentlydeveloped unit operation called extractive crystallization. This operation provides a method for removing a salt from aqueous solution with a minimum of energy, that is, with much less energy than that required in a triple-effect evaporator (Weingaertner et al, 1991;Brenner et al, 1992;Ting et al, 1992). …”

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confidence: 99%

Thermodynamics of phase equilibria in aqueous‐organic systems with salt

1994

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A semiempirical thermodynamic method is developed to establish a framework for calculating vapor‐liquid and liquid‐liquid equilibria in ternary systems containing water, an organic solvent, and a salt. Careful attention is given to precise definition of standard states. Short‐range ion‐solvent forces are taken into account primarily by a chemical‐equilibrium method based on stepwise ion solvation; however, physical contributions also contribute. Water‐cosolvent nonideality is described by an extended equation of the van Laar form. Long‐range electrostatic forces between ions are taken into account by an extended Debye‐Hückel equation with corrections for transferring from a McMillan‐Mayer to a Lewis‐Randall framework.The new method is illustrated with results for several systems including saturated aqueous mixtures of LiBr or LiCl with methanol where the salt concentration exceeds 20 molal. The method developed here is of particular interest for process calculations in extractive crystallization, a low‐energy operation for producing salt from aqueous solution.

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Thermodynamics of phase equilibria in aqueous‐organic systems with salt

1994

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“…However, the expensive installation cost and the high operational energy consumption of the high pressure equipments are major drawbacks for the gas and supercritical antisolvent processes. In this respect, a liquid antisolvent could be an attractive choice because the crystallization system does not require the use of heavy equipment and can be easily operated without the need for pressurization (Weingaertner et al, 2000).…”

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Liquid antisolvent crystallization of griseofulvin from organic solutions

Kim

Yeo

2015

Chemical Engineering Research and Design

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“…Liquid-liquid extraction in systems containing salts is an important separation technology in chemical engineering processes [1][2][3][4]. Several thermodynamic models have been developed for the prediction of liquid-liquid equilibrium conditions in these systems [5,6].…”

Section: Introductionmentioning

confidence: 99%

The influence of cation, anion and temperature on the liquid–liquid equilibrium of some pentanols–water system

El–Dossoki

2011

Fluid Phase Equilibria

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Extractive crystallization of salts from concentrated aqueous solution

Cited by 83 publications

References 5 publications

Thermodynamics of phase equilibria in aqueous‐organic systems with salt

Thermodynamics of phase equilibria in aqueous‐organic systems with salt

Liquid antisolvent crystallization of griseofulvin from organic solutions

The influence of cation, anion and temperature on the liquid–liquid equilibrium of some pentanols–water system

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