Patent ID: 6452051
Filing Date: 2002-09-17
Classification: C07C,C08G,Y02P

Abstract:
A process for the production of a condensation product selected from the group consisting of an amide and an ester of a carboxylic acid from an organic compound selected from the group consisting of organic compounds carrying a hydroxyl group and organic compounds carrying an amine group and from a concentrated medium resulting from fermentation, said medium containing a salt of said acid, said salt being selected from the group consisting of a sodium salt, a calcium salt and mixtures thereof and said medium being at a pH of at least the pKa of said acid, said process comprising:(a) reacting said medium with said organic compound and with CO2, said CO2 functioning in said reaction to displace the carboxylate anion from said sodium and calcium carboxylic salts, whereby said condensation product and a salt selected from the group consisting of sodium carbonate, sodium bicarbonate, calcium carbonate, calcium bicarbonate and mixtures thereof are formed; and, (b) separating said condensation product from the reaction mixture formed in step a.