PRODUCTION OF LACTIC ACID BY FERMENTATION AND EXTRACTION USING AMINES

摘要

The invention relates to a method for producing and isolating lactic acid, wherein the lactic acid is produced from a base material containing carbohydrates by fermentation while adding ammonia, and the release of the lactic acid from the ammonia salt of the lactate occurs by adding a mineral acid, and the isolation of the lactic acid occurs by an extraction using an alkylated amine, and extraction preferably occurring at a pH value of 4.0 to 2.0, wherein a multi-phase mixture is formed, which is split, whereupon the formed phase is either distilled using the lactate salt of the amine, wherein the lactic acid is obtained as a pure product, or the formed phase is thermally decomposed with the lactate salt of the amine, by means of which an oligolactide is obtained, which can be distilled, wherein pure dilactide is obtained. The invention further relates to a device, by means of which said method can be carried out.