Highly permeable nitrogen and phosphorus containing ion exchangers based on macro-lattice styrene copolymers

Abstract

Optimum conditions have been found for the synthesis of acidic phosphorus ion exchangers, as well as nitrogen and phosphorus containing ampholytes; their properties and compositions have been investigated. The phosphorylation of the original and chloromethylated copolymers of styrene with some divinyl compounds having various distances between the multiple bonds has been examined. Ampholytes with sufficient chemical and mechanical resistances have been produced by chemically modifying the unsubstituted chloromethyl groups present in the P containing co-polymers with pyridinecarboxylic acids and their nitriles. A comparison has been made of the sorption kinetics of the uranyl ion on the normal and the macro-lattice phosphatic polyelectrolytes. The stability constant of the UO 2 + complex with the functional groups of the poly-ampholyte has been found to be larger by one potency than for the initial phosphatic cation exchanger.