PROCESS AND INSTALLATION FOR THE RECOVERY OR .alpha.-HYDROXY-AND .alpha.-AMINO-CARBOXYLIC ACIDS FROM SUGAR-CONTAINING MEDIA

摘要

The invention relates to a process for the recovery of .alpha.-hydroxy- and .alpha.-amino-carboxylic acids from sugary media containing them. According to the process of the invention : - in a first phase, the mixture from which it is proposed to recover the .alpha.-hydroxy- or .alpha.-amino-carboxylic acid and which contains the latter in the form of its calcium salt is contacted with a cationic resin in the calcium form for a sufficient time to reach optimal adsorption of said calcium salt and then, - in a second phase, the previously saturated resin is eluted by resorting to water. The process according to the invention enables the quantitative production of a pure calcium salt.