PURIFICATION OF CaCl2 SOLUTIONS USING PUROLITE S930 RESIN DYNAMIC STUDIES

Camelia POPA, Costel MIRONEASA

Abstract

Resin Purolite S930 is used with numerous applications in refining salt solutions concerning transition metals. This work presents the influence of experimental conditions(?) to remove Fe(II) from 34% CaCl2 solutions using chelating resin Purolite S930 in dynamic regime and also the experimental conditions about desorbtion efficiency. The resuls show that under circumstances ( T=220C, volume of resin = 10,2 ml, layer heihgt=13 cm,  pH=2.3), usable breakthrough capacity decrease with the increasing of feeding flow and increasing of the concentration of Fe(II) in feeding solution. The volume of refined solution decreases with the increasing of Fe(II) concentration in feeding solution. Usable capacity for sorbtion in dynamic regime is 197 mg Fe(II)/g. Desorbtion effiency increase with height of resin bad and HCl concentration. Increasing the concentration of HCl from 2N to 10% and resin dose from 2 grames to 4 grames desorbtion effiency increases from 50 to 520 times.

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