A method for the isolation of 2 - ketostatines - polyhydroxy - c (arrow down) 6 (arrow down) - carboxylic acids, in particular of 2 - ketostatines - l - gulonic from aqueous fermentations

摘要

procedures for the extraction of 2 - keto - polyhydroxy - c6 carboxylic acids, in particular of 2 - keto - l - gulonsu00e4ure from aqueous fermentationsaustru00e4gen that characterized that $a (a) of the biomass is liberated, the 2 - keto - polyhydroxy - c6 carboxylic acid as calcium salt containing fermen tationsaustrag under a co2 pressure of 10 to 60 bar, in the presence of 2 to 6 molequivalenten,based on the fermentationsaustrag contained 2 - keto - polyhydroxy - c6 carboxylic acid, a long-chain lipophilic amine with a total of 15 to 40 c atoms and with 1.5 to 2.5% by weight.parts, based on the fermentationsaustrag, a c4 to c8 alkanols at temperatures between 10 and pumps, preferably 55 to 65 c extracted $a (b) the unusual calcium carbonate from $a (c) received 2 - keto - polyhydroxy - c6 carboxylic acid amines addukt in the free carboxylic acid or the splitting or derivative convicted.$a as amines are preferably used as alkanole tridodecylamin trioctylamin or, preferably butanole.