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The Advanced Computer Controlled Crystallization Unit, "QUCC/A", designed by EDIBON, is a crystallization unit that by means of the cooling method allows the visualization and study of the industrial operation of mass transfer in which the formation of a solid from a homogeneous phase (solute in solution) takes place. It is suitable for crystallization tests of those components whose solubility varies with temperature. The process is divided into two stages, a first one consisting of saturating the solution of the compound to be purified and a second cooling stage to obtain the crystals. The process is divided into two circuits with two tanks, one for the oversaturated solution, whose tank incorporates a temperature sensor and a computer-controlled stirrer, and another circuit for the saturated solution, whose tank has a temperature sensor. For the preparation of a saturated solution, there is an agitation tank and a pump that drives the solution to a heat exchanger, where it is heated to a temperature higher than the saturation temperature. Hot water circulates through the heat exchanger, which comes from a tank with a computer-controlled electrical resistance and is driven by