Application of electrodialysis in the production of malic acid

Concentration and purification of malate ion from a beverage industry waste water using electrodialysis with homopolar membranes

“…citric, tartaric, gluconic, itaconic and propionic [4]. Regarding purification of malic acid by electrodialysis, there are very few applications published and they are very specific of the biosynthesis process, focusing on a very close integration of the electrodialysis to the enzymatic reactor [7][8][9]; the resulting configurations (four-compartment cells) are therefore not transferable to the present case. Therefore, it seems interesting to study the potentiality of a two-stage electrodialytic process for the extraction of l-malic acid from the current effluent.…”

Low-waste fermentation-derived organic acid production by bipolar membrane electrodialysis—an overview

“…Enzymatic conversion of fumaric acid to L-malic acid was successfully integrated with CED to selectively recover malic acid from the reaction solution, after the precipitation and recycling of the remained fumaric acid (Bélafi-Bakó et al 2004). Though references for CED as a recovery process for fumaric acid are scarce, another integrated technique for ammonium-Lmalate production from ammonium-fumarate (Sridhar 1988) gives some clues that a CED process for primary recovery could be implemented for fumaric acid as well.…”

Ion‐Exchange membrane processes for clean industrial chemistry

“…A typical electrometathesis reaction at ambient temperature is the direct manufacture of malic acid (C4H605) from ammonium malate ((NH4)2C4H405) in a fermentation broth by the action of fumaric acid (C4H404) [42]. Using a stack in which the unit cell comprises four compartments, the ammonium ion of the malate and the proton of the fumaric acid are exchanged under the effect of the electric field.…”