Patent ID: 7815732

Claim:
A device for the partial crystallisation of a phase in a solution, comprising at least one pump for circulation of the solution in a circuit of a heat exchanger formed from at least one tube in contact with a cooling circuit, wherein the circuit of the exchanger includes a zone comprising static means to maintain supercooling in order to delay the appearance of crystals, the supercooling maintenance means including a non-stick coating on at least one part of the internal walls of each tube, where the coating takes the form of a material and/or of a surface state designed to delay the appearance of crystals, and a zone comprising static supercooling rupture means to allow the appearance of crystals, the supercooling rupture means include at least one change of coating of the internal walls of each tube, and/or at least one change of direction of the circulation of the solution, and/or at least one obstacle to the circulation of the solution on the internal walls of each tube, the change of coating of the internal walls taking the form of a change of material and/or of a change of the surface state, designed to interrupt the supercooling and allow the appearance of crystals.