Issue 8, 2023

Fast and simple preparation of microparticles of KHCO3 by a freeze-dissolving method with single solvent or additional antisolvent

Abstract

Microparticles featuring specific attributes are essential for the chemical industries. Microparticles of KHCO3 were prepared by a freeze-dissolving method, with one solvent or with additional antisolvent. Firstly, KHCO3 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 KHCO3. 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 KHCO3 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 KHCO3 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.

Graphical abstract: Fast and simple preparation of microparticles of KHCO3 by a freeze-dissolving method with single solvent or additional antisolvent

Supplementary files

Article information

Article type
Paper
Submitted
08 Jul 2023
Accepted
06 Sep 2023
First published
07 Sep 2023
This article is Open Access
Creative Commons BY license

RSC Sustain., 2023,1, 1982-1988

Fast and simple preparation of microparticles of KHCO3 by a freeze-dissolving method with single solvent or additional antisolvent

J. Luo, Q. Su, Q. Yu, X. Zhai, Y. Zou and H. Yang, RSC Sustain., 2023, 1, 1982 DOI: 10.1039/D3SU00234A

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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