Adsorption crystal habit modification

The feed preparation stage e.g. by mineral extraction and evaporation, chemical reaction etc. can give rise to both dissolved and suspended solid impurities, either of which may affect the crystallization step. Removal of suspended solids, e.g. by filtration, is usually the easier process. Dissolved impurities can have by far the more pronounced effect, however, and may have to be removed e.g. by chemical means or by adsorption. Such impurities may, of course, actually be beneficial to the process by inducing nucleation, habit modification etc. 

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