Ion exchange with irreversible reaction in deep fluidized beds

The exchange of CI − ion between dilute aqueous solutions of hydrochloric acid and the ion exchange resin IRA‐425 in fluidized beds was studied in a laboratory size column. Analysis of the experimental data showed that axial mixing of particles in deep beds was incomplete and also that packed and fluidized bed break‐through curves were similar. A model is proposed describing the bed as a series of mixing stages for solids with axially dispersed flow of liquid. Data are presented in support of such a concept. An empirical method is proposed for prediction of the break‐through curves at various operating conditions, requiring only a very limited amount of experimentation.