Title:
PURIFICATION OF AROMATIC ACID OR ITS SALT
Document Type and Number:
Japanese Patent JPS5594333
Kind Code:
A
Abstract:
A method of removing impurities from aromatic sulfonic acids or carboxylic acids, or their salts comprises treating a solution of the acids or salts in water with a basic nitrogen- containing polymer compound, separating the flocs from the treated solution, and isolating the pure product.
Inventors:
HAINTSU NOISHIETSUTSU
Application Number:
JP63980A
Publication Date:
July 17, 1980
Filing Date:
January 09, 1980
Export Citation:
Assignee:
CIBA GEIGY AG
International Classes:
C07C51/00; C07C51/47; C07C65/00; C07C67/00; C07C229/64; C07C301/00; C07C303/00; C07C303/42; C07C309/28; (IPC1-7): C07C51/47; C07C101/74; C07C139/14; C07C143/24