Title:
結晶化による物質の精製方法及び装置
Document Type and Number:
Japanese Patent JP4500970
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.
More Like This:
Inventors:
Boop, Gunter
Mosler, Jurgen
Mosler, Jurgen
Application Number:
JP2000597040A
Publication Date:
July 14, 2010
Filing Date:
January 21, 2000
Export Citation:
Assignee:
Evonik Stockhausen Game Behr
International Classes:
B01D9/00; B01D9/02; C07C57/04; C07C51/43; C07C57/07
Domestic Patent References:
| JP7082210A | ||||
| JP9157212A | ||||
| JP7278045A | ||||
| JP5294892A |
Attorney, Agent or Firm:
Shuji Iwamiya