Chrystallisation method and installation

Details Chrystallisation method and installation Chrystallisation method and installation

B - Operations, Transporting

01

D

B01D 9/02 (2006.01) B01D 9/00 (2006.01)

Patent

CA 2268591

The present invention relates to a method and installation for the crystallisation of a liquid from a solution, a suspension or a mixture of liquids using a crystalliser which, for example, is provided on its wall with a heat exchanger and comprises a single chamber for both nucleation, and growth. Depleted mother liquor is withdrawn from the crystallisation vessel via a filter located in the crystalliser, so that the crystal content in the vessel can be accurately adjusted for the purpose of optimum separation of the crystals, preferably using a packed-bed wash column. The crystalliser preferably contains a stirrer with the filter on the stirrer shaft. The filter rotates past a scraper, which is arranged in a fixed position, as a result of which the filter cake can be reintroduced into the suspension without damage to the crystals.

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