PROPERTIES OF SOLID AND LIQUID ION-EXCHANGERS .7. SIMPLE-MODEL FOR THE FORMATION OF MIXED MICELLES APPLIED TO SALTS OF DINONYLNAPHTHALENE SULFONIC-ACID

In previous papers in this series it was found[1,2] that ion exchange and water sorption data for dinonylnaphtalene sulfonic acid (HD) in various solvents could be fitted by the expression Y=y1 X ̄+y2(1- X ̄)+y′2 X ̄(1- X ̄)Y is the property studied and yi the same property related to three kinds of micelles, those corresponding to the pure salts (y1 and y2) and mixed micelles containing both ions (y′3). X is the equivalent fraction of metal ion in the organic phase the H+Me2+ exchange being studied. In the present paper it is shown that if it assumed that the distribution of ions over the three kinds of micelles is random the quantities in eqn (1) can be given a simple physical interpretation. © 1979.