Fast and simple preparation of microparticles of KHCO 3 by a freeze-dissolving method with single solvent or additional antisolvent
Microparticles featuring specific attributes are essential for the chemical industries. Microparticles of KHCO 3 were prepared by a freeze-dissolving method, with one solvent or with additional antisolvent. Firstly, KHCO 3 aqueous solution was dripped into liquid nitrogen to prepare ice spherical pa...
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Veröffentlicht in: | RSC sustainability 2023-11, Vol.1 (8), p.1982-1988 |
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Hauptverfasser: | , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Microparticles featuring specific attributes are essential for the chemical industries. Microparticles of KHCO
3
were prepared by a freeze-dissolving method, with one solvent or with additional antisolvent. Firstly, KHCO
3
aqueous solution was dripped into liquid nitrogen to prepare ice spherical particles, and additional antisolvent, ethanol, was used to dissolve the ice scaffolding to isolate the microparticles of KHCO
3
. In this work we have developed a new freeze-dissolving method with only one solvent, water. After formation of ice particles, a low-temperature saturated aqueous solution of KHCO
3
was used to dissolve the ice in frozen spherical particles at low temperature to isolate the microparticles. Both freeze-dissolving methods were 100 times faster and more energy-efficient than the traditional freeze-drying method. The microparticles of KHCO
3
obtained by the freeze-drying method and freeze-dissolving with antisolvent and with saturated solution were characterised with SEM and the particle size distributions were compared. |
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ISSN: | 2753-8125 2753-8125 |
DOI: | 10.1039/D3SU00234A |