Eutectic freeze crystallization with an aqueous KNO3-HNO 3 solution in a 100-L cooled-disk column crystallizer

Raymond Vaessen; Marcelo Seckler; Geert Jan Witkamp

doi:10.1021/ie020946c

Eutectic freeze crystallization with an aqueous KNO₃-HNO ₃ solution in a 100-L cooled-disk column crystallizer

Raymond Vaessen, Marcelo Seckler, Geert Jan Witkamp^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

Eutectic freeze crystallization is a novel technique for processing waste and process streams of aqueous electrolyte solutions, separating them into pure water and pure solid salt. A dedicated apparatus, a 100-L cooled-disk column crystallizer, has been developed and tested, combining crystallization and solid/solid separation of ice and salt. Experiments have been performed with a ternary system of aqueous KNO₃-HNO₃. Heat-transfer rates were achieved in the range of 1300-4600 W·m^-2·K ^-1, which are related to the square root of the scraping rate. The ice product slurry contained 0.15 wt % salt. The ice impurity content after three washing cycles was as low as 15 ppm K⁺. Well-faceted KNO ₃ crystals are produced with high purity.

Original language	English (US)
Pages (from-to)	4874-4880
Number of pages	7
Journal	Industrial and Engineering Chemistry Research
Volume	42
Issue number	20
DOIs	https://doi.org/10.1021/ie020946c
State	Published - Oct 1 2003
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

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abstract = "Eutectic freeze crystallization is a novel technique for processing waste and process streams of aqueous electrolyte solutions, separating them into pure water and pure solid salt. A dedicated apparatus, a 100-L cooled-disk column crystallizer, has been developed and tested, combining crystallization and solid/solid separation of ice and salt. Experiments have been performed with a ternary system of aqueous KNO3-HNO3. Heat-transfer rates were achieved in the range of 1300-4600 W·m-2·K -1, which are related to the square root of the scraping rate. The ice product slurry contained 0.15 wt % salt. The ice impurity content after three washing cycles was as low as 15 ppm K+. Well-faceted KNO 3 crystals are produced with high purity.",

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AU - Seckler, Marcelo

AU - Witkamp, Geert Jan

PY - 2003/10/1

Y1 - 2003/10/1

N2 - Eutectic freeze crystallization is a novel technique for processing waste and process streams of aqueous electrolyte solutions, separating them into pure water and pure solid salt. A dedicated apparatus, a 100-L cooled-disk column crystallizer, has been developed and tested, combining crystallization and solid/solid separation of ice and salt. Experiments have been performed with a ternary system of aqueous KNO3-HNO3. Heat-transfer rates were achieved in the range of 1300-4600 W·m-2·K -1, which are related to the square root of the scraping rate. The ice product slurry contained 0.15 wt % salt. The ice impurity content after three washing cycles was as low as 15 ppm K+. Well-faceted KNO 3 crystals are produced with high purity.

AB - Eutectic freeze crystallization is a novel technique for processing waste and process streams of aqueous electrolyte solutions, separating them into pure water and pure solid salt. A dedicated apparatus, a 100-L cooled-disk column crystallizer, has been developed and tested, combining crystallization and solid/solid separation of ice and salt. Experiments have been performed with a ternary system of aqueous KNO3-HNO3. Heat-transfer rates were achieved in the range of 1300-4600 W·m-2·K -1, which are related to the square root of the scraping rate. The ice product slurry contained 0.15 wt % salt. The ice impurity content after three washing cycles was as low as 15 ppm K+. Well-faceted KNO 3 crystals are produced with high purity.

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Eutectic freeze crystallization with an aqueous KNO₃-HNO ₃ solution in a 100-L cooled-disk column crystallizer

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