PROCESS FOR TRANSFERRING, REMOVING, OR CONCENTRATING ELECTROLYTE OR ION OF ELECTROLYTE CONTAINED IN ORGANIC NON-ELECTROLYTE SOLUTION BY ELECTRODIALYSIS

摘要

PURPOSE:To transfer, remove, or concentrate electrolyte or electrolyte ion from solution of non-electrolyte contg. the electrolyte independently of the content of an org. non-electrolyte by varying conditions of dialysis in PVA electrodialysis, particularly pH condition of the solution appropriately. CONSTITUTION:Electrolyte ion contained in an org. non-electrolyte solution contg. the electrolyte is separated by first adjusting the pH of the soln. in accordance with the property of the soln., then, performing electrodialysis using a combination of a cation exchange resin membrane with a PVA neutral membrane (designated briefly ''PVA electrodialysis'' hereunder). If the soln. comprised caramel as org. non-electrolyte, aminoacid as org. electrolyte, and NaCl as inorg. electrolyte, NaCl i.e. an inorg. electrolyte, alone is transferred to the concentrated liquid side by performing PVA electrodialysis at a pH of the isoelectric point of the amino acid, and the amino acid can be left in the diluted liquid side together with caramel coloring matter.