The first and most commonly used application for the SoliQz HWC® is suspension-based melt crystallisation. This is a powerful technique to obtain very high purity organic chemicals and metals. Pure crystals will be formed when an impure melt is cooled in a controlled way, because most impurities with a deviating shape and/or size will not fit into the very regular crystal lattice. A SoliQz HWC® can be installed downstream of the crystalliser to carry out the separation of the pure crystals from the impure mother liquor. Melt crystallisation usually has a higher selectivity than distillation and extraction. The high selectivity, the low energy consumption and the absence of solvents make melt crystallisation a perfect example of a ‘green’ production process, while it also fulfills the increasing demand for high-purity products in industry. The SoliQz HWC® has been proven to work successfully at lab scale and pilot scale for over 100 compounds. It has been adopted at semi industrial scale in two applications.