Patent ID: 6627768
Filing Date: 2003-09-30
Classification: C07C,C08G

Abstract:
A process for the conversion of an extracted carboxylic acid to a non-ionized derivative thereof, comprising contacting a carboxylic acid containing aqueous solution with a water-insoluble amine solvent, to recover acid therefrom and to form an extract carrying amine-bound carboxylic acid, characterized in that said extract is contacted with a concentrated aqueous solution of said same acid of high concentration, wherein said extract, carrying amine-bound carboxylic acid, is split into two streams, a first stream which is back-extracted with water and concentrated to form said concentrated solution for contact with said second stream, whereby additional acid is transferred to said extract to form a loaded extract and said loaded extract is reacted to form a non-ionized derivative of said acid, by reactions known per se, whereby said acid is converted into a non-ionized derivative form and said amine solvent is liberated for recycling.