Title:
METHOD FOR PURIFYING LONG-CHAIN DIBASIC ACID
Document Type and Number:
Japanese Patent JP2005194211
Kind Code:
A
Abstract:
To provide a method for purifying a high-purity long-chain dibasic acid from a substance containing a long-chain dibasic acid by a simple operation.
The method for purifying a long-chain dibasic acid comprises evaporating a long-chain dibasic acid from a substance containing a long-chain dibasic acid in vacuum, cooling, solidifying and recovering the long-chain dibasic acid. Preferably a solid substance obtained by removing an insoluble component from a fermented solution containing a long-chain dibasic acid produced by a fermentation method using a microorganism and precipitating the resulting substance is used as the substance containing a long-chain dibasic acid.
Inventors:
YOKOTA TADASHI
Application Number:
JP2004000093A
Publication Date:
July 21, 2005
Filing Date:
January 05, 2004
Export Citation:
Assignee:
JAPAN ENERGY CORP
International Classes:
C12P7/44; B01D1/00; B01D7/02; C07C51/43; C07C51/44; C07C55/02; (IPC1-7): C07C51/43; B01D1/00; B01D7/02; C07C51/44; C07C55/02
Attorney, Agent or Firm:
Kazuo Fujiyoshi