結晶化による物質の精製方法及び装置

Title:

結晶化による物質の精製方法及び装置

Document Type and Number:

Japanese Patent JP4903852

Kind Code:

B2

Abstract:

The invention relates to a method and a device for purifying mixtures of substances by means of optionally fractional crystallization. During the crystallization process, impurities can precipitate in addition to the desired product, since these are present in such high concentrations that the limit of solubility is exceeded. According to the inventive method, a solvent or a mixture of solvents with a strong affinity to an impurity with a tendency to precipitate is added to the mixture of substances or the melt to be purified so that the corresponding impurity is kept in solution. If there are several impurities with a tendency to precipitate, some of the impurities can be kept in solution by adding a suitable solvent and the remainder can be separated by mechanical means, e.g. filtering by suction, centrifugation, etc.

Inventors:

Boop, Gunter
Mosler, Jurgen

Application Number:

JP2009251882A

Publication Date:

March 28, 2012

Filing Date:

November 02, 2009

Export Citation:

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