Abstract
Hydrotalcite was produced by solid-state reaction with magnesium hydroxide particles as the precursor using the impinging stream method. Traditional impinging stream reactors are complex or prone to blockage during the reaction process. To solve this problem, computational fluid dynamics (CFD) simulation was used to optimize the operating conditions in 1 L and 10 L impinging jet crystallizers to produce hydrotalcite. The produced hydrotalcite had a uniform morphology, large particle size, narrow particle size distribution and high purity (>99%), which enabled the controlled reactive crystallization of high-quality hydrotalcite and provided theoretical support for industrial scale-up. Moreover, the solid-state reaction kinetics were analyzed and showed that the reactive crystallization of hydrotalcite could be explained by nucleation and nuclei growth mechanism.
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