Batch and continuous crystallization are two different methods of producing solid materials, with batch crystallization being a discontinuous process that is controlled by adjusting various parameters and continuous crystallization being a continuous process that is controlled by adjusting feed rates and flow rates. Continuous crystallization is generally more efficient and produces more uniform crystals but requires specialized equipment.  The main differences between batch and continuous crystallization are as follows:
Process: Batch crystallization is a discontinuous process, meaning that the crystallization process is carried out in a single batch, starting with a liquid solution, then cooling or evaporating the solution to induce crystallization, and finally separating the crystals from the mother liquor. In contrast, continuous crystallization is a continuous process, meaning that the liquid solution is fed continuously into a crystallizer, and the crystals are continuously separated from the mother liquor.
Control: In batch crystallization, the process is controlled by adjusting parameters such as temperature, concentration, and agitation, which can be difficult to maintain consistently from batch to batch. In contrast, continuous crystallization can be more easily controlled by adjusting the feed rate, flow rates, and residence time in the crystallizer, which can be monitored and adjusted in real time.
Efficiency: Continuous crystallization is generally more efficient than batch crystallization because it can produce a higher yield of product in a shorter amount of time. Additionally, continuous crystallization can result in more uniform crystal sizes and shapes, which can be important for certain applications.
Equipment: Batch crystallization typically requires larger vessels to accommodate the entire batch, while continuous crystallization can be performed in smaller vessels that can be scaled up or down as needed.