Conversion of dipotassium malate to malic acid by electromembrane processes Original Research Article

Conversion of dipotassium malate to malic acid was carried out through conventional electrodialysis and through electrolysis in combination with cation-exchange membranes. For the first method, hydrochloric acid was added to dipotassium malate, and the potassium chloride that formed was removed by electrodialysis. For the second method, H+ generated at the anode during electrolysis of water migrated through cation-exchange membranes and converted dipotassium malate to malic acid.