> About Ion-Exchage Resins

DIAION™ ion-exchange resins


DIAION™ products are high quality ion-exchange resins, chelating resins, and synthetic adsorbents produced by Mitsubishi Chemical Corporation and its subsidiary producers.  According to Mitsubishi Chemical's experience in ion-exchange resin manufacture of over forty years, DIAION™ reisns are well production-controlled and have excellent properties for various applications.

Types of DIAION™ ion-exchange resins

Ion-exchage resins are classified as follows based on their chemical structures or functionalities.

type base functional group matrix
strongly acidic cation-exchange resin styrenic sulfonic acid gel / porous
highly porous
weakly acidic cation-exchange resin l>acrylic
acrylic acid
methacrylic acid
highly porous
strongly basic antion-exchange resin styrenic quaternary ammonium
(type I and type II)
gel / porous
highly porous
weakly basic antion-exchange resin styrenic
tertiary amine
highly porous
others (chelating resins)   special lignads highly porous

Matrix structure:

GEL type ion-exchange resins are most commonly used and have homogeneous matrix structure inside the beads.  This type of matrix gives so-called micropores that are formed by the polymeric networks.  Water and solute speices difuse into and out from the bead through the micropores.
Porous resins have rather large pores as well as micropores.  The large pores (macropores) give improved difusion of solutes inside beads
Highly Porous resins have more enhanced macroporosity.  Resins of this type can be used for processing of large molecules or can be used in non-aqueous media.

Application of ion-exchage resins

Typical applications of ion-exchange resins are as follows:

Category Applications
water treatment softening, industrial water
highly pure water ultrapure water, concentrate demineralizaiton
waste water heavy metals recovery, electroplating
sugar refining decolorization, demineralization, separation
food processing decolorization, aminoacid purification, debittering
chemical process chemicals purification, reaction catalyst

For technical details of each application, please refer to literatures such as "DIAION™ technical brochure I & II."