Deionization Equilibria between Mixed Cation and Anion Exchange Resins and a Dilute NaCl Solution

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Tadaaki Nishiki¹  Akinori Muto¹  Takeshi Kataoka¹ 

[1] Department of Chemical Engineering, College of Enginecring, University of Osaka Prefecture

关键词: Ion Exchange;    Mixed Resin;    Deionization Equilibrium;    Dilute Solution;   

DOI  :  10.1252/jcej.26.644

来源: Maruzen Company Ltd

【 摘 要 】

References(6)Cited-By(4)The equilibrium relation between mixed cation and anion exchange resins and a dilute salt in water are investigated. Considering the equilibrium characteristic values of each ion exchange and also the mixed-volume fraction of both resins, equilibrium equations are derived on the basis of both cation and anion exchange reactions and the neutralization reaction between H+ and OH– eluted from the resins. When both resins are mixed in equal equivalence for ion exchange, the equilibrium relation becomes a rectangular isotherm and is not affected by a concentration of a salt, ionic valence of species composing the salt, or the equilibrium constants of both ion exchanges. When mixed in unequal equivalence, the deionization equilibrium is influenced by the above factors. Especially, the effect of the mixed volume fraction on the equilibrium relationships depends greatly on the valence of ions composing the salt.The experimental results using aqueous NaCl solution showed good agreement with the calculated ones.

【 授权许可】

Unknown