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
Hauptverfasser: Luo, Jiaqi, Su, Qifan, Yu, Qiushuo, Zhai, Xinyue, Zou, Yuan, Yang, Huaiyu
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.
ISSN:2753-8125
2753-8125
DOI:10.1039/D3SU00234A