TH6445B - Production of citric acid - Google Patents

Abstract

regeneration of citric acid Based on citric acid weight, this method consists of i) evaporation of the citric acid fermentation to obtain a concentrate with a citric acid concentration of at least 80% of the saturation value. at the evaporation temperature; amine with citric solution circulating acid in which the citric acid concentration is lower than the equilibrium value inserted Corresponding to liquid medium that is concentrated at temperature. which extracted To obtain an amine extract with a more concentrated solution of citric acid and citric acid raffinate in water iii) Raffinate in the water obtained from extracted from the action Such extraction causes a small fraction of the substance to flow out. and circulating again to balance the evaporation. and reverse extraction with water to An aqueous solution of citric acid was obtained and an amine extract with a depleted citric acid solution was obtained at a concentration below the equilibrium value corresponding to the concentrated liquid medium and v. ) The amine extract containing the depleted citric acid solution was recirculated into the extraction process.

Claims (3)

1. The process for recovering citric acid from citric acid broth consists of: i) Evaporating the citric acid broth to obtain a concentrate with a citric acid concentration of at least 80% of the saturation value at the evaporation temperature; ii) Extracting this concentrate using an amine extract with recirculated citric acid solution, where the citric acid concentration is below the equilibrium value corresponding to the concentrated liquid culture medium at the extraction temperature, to obtain an amine extract with a higher concentration of citric acid solution and citric acid rapcinate in water; iii) Removing the rapcinate from the extracted solution, allowing a small amount of rapcinate to flow out and recirculate to balance the evaporation; iv) Removing the amine extract with the concentrated citric acid solution and performing back-extraction with water to obtain... A citric acid solution was obtained in water, and an amine extract containing a depleted citric acid solution was obtained, with a concentration lower than the equilibrium value corresponding to the concentrated liquid culture medium. v) The amine extract containing the depleted citric acid solution was recirculated back into the extraction process. 2. The procedure under claim 1 consists of washing the amine extract containing the aforementioned concentrated citric acid solution with a small amount of water before reverse extraction, and then recirculating the washing water for evaporation. 3. The process under claim 1, which involves the production of an acetic acid solution in water using charcoal (3 claims, 1 page, 2 images).