The reaction vessel is stirred, and more and more solid material precipitates at the upper part where stirring takes place
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I would like to ask everyone: there is a crystallization tank in the workshop. As the number of times it is used for crystallization increases, more and more solids accumulate at the top of the stirring rod. What measures can be taken to effectively avoid this situation?
Is the density of the crystals greater than that of the mother liquor? If so, the crystals should settle. As for the solids forming on the stirring shaft, this occurs because during mixing, the crystals attach to the shaft. One solution is to periodically increase the liquid level in the crystallization tank while reducing the stirring speed, thereby allowing the crystals to settle and the ones on the stirring shaft to melt. Another approach is to reduce the concentration of the mother liquor below its saturation level and raise the liquid level in the crystallization tank, so that the crystals on the stirring shaft melt
It’s inevitable – when stirring, the liquid will splash; if it adheres to something, it will precipitate. Use a smooth rod to reduce adhesion, and add a spray head for cleaning