caa a22 4500 475763378 CHVBK 20180406123557.0 cr unu---uuuuu 170329e20000101xx s 000 0 eng 10.1007/s003960050008 doi (NATIONALLICENCE)springer-10.1007/s003960050008 Electrodialytic separation of potassium ions from sodium ions in the presence of crown ether using a cation-exchange membrane [Elektronische Daten] [T. Sata, M. Tanimoto, K. Kawamura, K. Matsusaki] The separation of potassium and sodium ions from their mixture was performed by electrodialyzing a mixed solution of potassium chloride and sodium chloride in the presence of 18-crown-6 using a commercial cation-exchange membrane. After 18-crown-6 had been impregnated in the membrane, the mixed solution containing 18-crown-6 was electrodialyzed as the desalting-side solution. The permeation of potassium ions through the membrane decreased remarkably and the electrical resistance of the membrane increased during electrodialysis with increasing concentration of 18-crown-6 in the solution. Because potassium ions form a more stable complex with 18-crown-6 than sodium ions and because the complex permeated through the membrane with difficulty, sodium ions are thought to selectively permeate through the membrane. The current efficiency in electrodialysis was greater than 97.0%. Springer-Verlag Berlin Heidelberg, 2000 Key words Separation of potassium ions from sodium ions nationallicence 18-Crown-6 nationallicence Cation-exchange membrane nationallicence Electrodialysis nationallicence Sata T. Department of Applied Chemistry and Chemical Engineering Faculty of Engineering Yamaguchi University Tokiwadai 2-16-1, Ube Yamaguchi, 755-8611, Japan, JP aut Tanimoto M. Department of Applied Chemistry and Chemical Engineering Faculty of Engineering Yamaguchi University Tokiwadai 2-16-1, Ube Yamaguchi, 755-8611, Japan, JP aut Kawamura K. Department of Applied Chemistry and Chemical Engineering Faculty of Engineering Yamaguchi University Tokiwadai 2-16-1, Ube Yamaguchi, 755-8611, Japan, JP aut Matsusaki K. Department of Applied Chemistry and Chemical Engineering Faculty of Engineering Yamaguchi University Tokiwadai 2-16-1, Ube Yamaguchi, 755-8611, Japan, JP aut https://doi.org/10.1007/s003960050008 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s003960050008 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sata T. Department of Applied Chemistry and Chemical Engineering Faculty of Engineering Yamaguchi University Tokiwadai 2-16-1, Ube Yamaguchi, 755-8611, Japan, JP aut NATIONALLICENCE 700 1- Tanimoto M. Department of Applied Chemistry and Chemical Engineering Faculty of Engineering Yamaguchi University Tokiwadai 2-16-1, Ube Yamaguchi, 755-8611, Japan, JP aut NATIONALLICENCE 700 1- Kawamura K. Department of Applied Chemistry and Chemical Engineering Faculty of Engineering Yamaguchi University Tokiwadai 2-16-1, Ube Yamaguchi, 755-8611, Japan, JP aut NATIONALLICENCE 700 1- Matsusaki K. Department of Applied Chemistry and Chemical Engineering Faculty of Engineering Yamaguchi University Tokiwadai 2-16-1, Ube Yamaguchi, 755-8611, Japan, JP aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer