Abstract

Boiler water and industrial water which are treated by ion exchange resin, contain sulfate and chloride as strong acidic salt and bicarbonate as weak acidic salt. Previously, we reported on Na+-H+ exchange equilibrium in the mixed solution of strong acidic salt and weak acidic salt.The present work was carried out to study the rate of exchange reaction in the mixed solution of NaCl-CH3COONa, and NaCl-HCOONa. The relation between H, height of exchange zone, and H. T. U. is given by Eq. (4). H was obtained by means of measuring the break-through curves of the solution. The values of H. T. U. decreased with β, equivalent fraction of strong acidic salt, and increased with Re. Correlating H. T. U. with Re and Sc as shown in Fig. 6, H. T. U. is expressed by Eq. (6). Fig. 7 shows the comparison between the values of the break-through capacity of resin bed obtained from experiments and the values calculated by means of Eqs. (6) and (7).

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