Niro Process Technology B.v.

Sulzer Chemtech Ag

Sulzer Management Ag

Johannes Josephus Andreas Gerardus Jansen

Halbe Anne Jansen

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 Depleted mother liquor is withdrawn from the crysiallisation vessel via a filter,located in the crystalliser, so that the crystal content in the vessel can be accurately adjusted for the purpose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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Bergeijk, Netherlands

Johannes Josephus Andreas Gerardus Jansen