Process for the selective removal of sodium cations from a solution containing sodium and ammonium cations

摘要

A process is provided for selectively removing sodium ions from a solution containing sodium and ammonium ions using a polysulfonated aromatic cation exchange resin. The polysulfonated resin exhibits enhanced selectivity for sodium ions over ammonium ions when compared with conventional, monosulfonated cation exchange resin. This enhanced selectivity results in a lower concentration of sodium ion leakage and longer bed life to critical leakage, compared with conventional, monosulfonated resins.