Separation of Amino Acids by Electrodialysis with Ion-Exchange Membranes

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Joshua S. Dranoff¹  Hiroshi Takahashi²  Ken-ichi Kikuchi²  Shuichi Higashino²  Takeshi Gotoh² 

[1] Department of Chemical Engineering, Northwestern University;Department of Materials Engineering and Applied Chemistry, Akita University

关键词: Membrane Separation;    Electrodialysis;    Ion Exchange;    Amino Acid;    Transport Number;   

DOI  :  10.1252/jcej.28.103

来源: Maruzen Company Ltd

【 摘 要 】

References(18)Cited-By(24)The selective separation of amino acids, glutamic acid, methionine and lysine, from their solution mixture was examined by electrodialysis with ion-exchange membranes, SELEMION-CMV and SELEMION-AMV, under conditions of pH 1 to 12 and current densities of 0 to 15 A/m2. The amino acids were almost completely separated from each other under the conditions studied: Only glutamic acid is transported across the anion-exchange membrane; only lysine across the cation-exchange membrane; and methionine is not transported at all. Their fluxes across the membranes have maxima in the neutral pH range, increasing almost linearly with current density. A model for explanation of the experimental results has been proposed considering solution equilibrium, ion-exchange equilibrium and diffusion in the membranes. Successful simulation has confirmed the amino acid transport mechanism which was proposed in the model. The diffusivities of ionic species, model parameters, have been determined. Moreover the role of each ionic species in carrying current and the effect of water splitting are also discussed.

【 授权许可】

Unknown