PROCESS FOR THE ISOLATION AND PURIFICATION OF FREE ACIDS, STARTING FROM THEIR SALTS, BY ELECTRODIALYSIS

摘要

Process for the isolation and purification of free acids, starting from their salts, by electrodialysis which involved the use of: i) an electrolytic cell of four compartments, in which the two compartments adjacent to the two electrodes are separated from the central compartments by means of cationic membranes (2) and the central compartments are separated from one another by means of an anionic membrane (1); or, alternatively, ii) a module formed by an array of cells of 4 compartments separated from one another by alternating anionic membranes and cationic membranes. By means of this process, the simultaneous presence of the isolated free acids and their salts in the same compartment is prevented, which increases their purity. A large number of acids and amino acids can be isolated and purified. In a preferred embodiment, the purification and isolation of IDA is described. Figures 1 and 2