Solid separation from a mixed suspension through electric-field-enhanced crystallization

Journal Article (2016)
Authors

W. Li (TU Delft - Intensified Reaction and Separation Systems)

N Radacsi (The University of Edinburgh, TU Delft - Intensified Reaction and Separation Systems)

Herman J.M. Kramer (TU Delft - Intensified Reaction and Separation Systems)

Antoine Van Der Heijden (TU Delft - Intensified Reaction and Separation Systems, TNO)

Joop H. terHorst (Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS))

Research Group
Intensified Reaction and Separation Systems
To reference this document use:
https://doi.org/10.1002/anie.201609832
More Info
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Publication Year
2016
Language
English
Research Group
Intensified Reaction and Separation Systems
Issue number
52
Volume number
55
Pages (from-to)
16088-16091
DOI:
https://doi.org/10.1002/anie.201609832

Abstract

When applied to a pure component suspension in an apolar solvent, a strong inhomogeneous electric field induces particle movement, and the particles are collected at the surface of one of the two electrodes. This new phenomenon was used to separately isolate two organic crystalline compounds, phenazine and caffeine, from their suspension in 1,4-dioxane. First, crystals of both compounds were collected at different electrodes under the influence of an electric field. Subsequent cooling crystallization enabled the immobilization and growth of the particles on the electrodes, which were separately collected after the experiment with purities greater than 91%. This method can be further developed into a technique for crystal separation and recovery in complex multicomponent suspensions of industrial processes.

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