Title:
【発明の名称】アミドカルボン酸の精製
Document Type and Number:
Japanese Patent JPH10500941
Kind Code:
A
Abstract:
This invention relates to a four step process for purifying amido-carboxylic acids by liquid/liquid extraction from a reaction mixture containing an amido-carboxylic acid. The first step involves distilling impurities from a reaction mixture containing an amido-carboxylic acid to form a distillate residue. The second step involves mixing the distillate residue with a nonpolar hydrocarbon solvent wherein the mixture is maintained above the freezing point of the distillate residue. The third step involves allowing the hydrocarbon solvent and distillate residue to achieve phase separation of an organic phase containing the amido-carboxylic acid and an organic phase containing the nonpolar hydrocarbon solvent. The fourth step involves separating the organic phase containing the nonpolar hydrocarbon solvent from the organic phase containing the amido-carboxylic acid.
Inventors:
Zima, George Chester
William Hughes, Thomas Hugh
Mark Shelton, Mark Robert
William Hughes, Thomas Hugh
Mark Shelton, Mark Robert
Application Number:
JP52702895A
Publication Date:
January 27, 1998
Filing Date:
April 07, 1995
Export Citation:
Assignee:
Eastman Chemical Company
International Classes:
C07C231/24; C07C233/47; (IPC1-7): C07C233/47; C07C231/24
Attorney, Agent or Firm:
Takashi Ishida (2 outside)