Properties of ion-exchange resins

Hydraulic properties, of ion-exchange resins, 74 399 403 Hydraulic retention time (HRT), in biological waste treatment, 25 829 Hydraulic scales, 26 229-230 Hydraulic-settling classifiers, 22 275 Hydrazide(s), 70 504 73 573-576... 

Physical properties of ion-exchange resins (Perry and Green, 1999)... 

Strongly functional cation and anion e.xchange resins when hydrated (swollen) dis.s K iute (ionize) giving an internal electrolyte which is undetectable externally unless ion exchange occurs. This fundamental property of ion exchange resins is easily demonstrated using coloured acid-base indicators. 

Gregor and Pepper and their co-workers have carried out detailed studies on the swelling properties of ion exchange resins from which the following general conclusions may be drawn ... 

Pietrzyk, D. J. 1969. Ion-exchange resins in non-aqueous solvents—III, solvent-uptake properties of ion-exchange resins and related adsorbents, Talanta, 16 169-179. 

The chemical properties of ion exchange resins are described fully in books by Kunin and Myers (K7) and by Nachod (Nl), which give a general technical basis for selecting ion exchange materials for particular applications. 

W. Juda, N.W. Rosenberg, J.A. Marinsky and A.A. Kasper, Electrochemical properties of ion exchange resins. I. Donnan equilibria, membrane potential and conductivities, J. Am. Chem. Soc., 1953, 74, 3736 J.T. Clarke, J.A. Marinsky, W. Juda, N.W. Rosenberg and S. Alexander, Electrochemical properties of a permionic anion membrane, J. Phys. Chem., 1952, 56, 100. 

This book contains 17 chapters and is divided into 3 parts. Chapters 1-5 deal with the more fundamental aspects of known types of polystyrene networks, like type of networks, the formation of macroporous polymers, the preparation of continuous polymeric beds and the properties of ion-exchange resins, among other examples. 

Bauman, W. C. Fundamental properties of ion-exchange resins. Ion-Exchange, Theory and Application, edited by F. C. Nachod. Academic Press, New York (1949). 

Physical and chemical structure of resins. The basic material requirements for ion-exchange beads are insolubility, bead size, and resistance to fracture. The resin must be insoluble under normal operating conditions. The beads must be in the form of spheres of uniform dimension normal size range is between 16 and 50 U.S. Mesh. The swelling and contraction of the resin bead during exhaustion and regeneration must not cause the beads to burst. Also, an important property of ion-exchange resins is that the active site is permanently... 

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