Process and device for the separation of liquid eutectic mixtures by crystallisation on cooling surfaces

摘要

The process separates fluid eutectic mixtures by crystallising onto cooling surfaces, on which seed crystals have been applied. This promotes the selective eutectic growth of crystals of the same structure, following which the surfaces are heated to recover the substance deposited, in liquid form. The seed crystals are layered onto the cooling surface. Only one eutectic forming substance is used in the seed layer. Also claimed is a plant to carry out the process, including a pair of heat exchangers (1a, b) with supply (12) and outlet (13) lines for cooling medium. These can be connected to a common supply line (9). The outlet lines can each be connected to a separate (2, 4) or common (2) interception vessel.