The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 05, 2001
Filed:
Apr. 06, 1999
Halbe Anne Jansen, Maren-Kessel, NL;
Johannes Josephus Andreas Gerardus Jansen, Bergeijk, NL;
Niro Process Technology B.V., , NL;
Abstract
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 Depleted mother liquor is withdrawn from the crysiallisation vessel via a filter,located in the crystalliser, so that the crystal content in the vessel can be accurately adjusted for the purpose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.