Synthese und Eigenschaften eines chelatbildenden Austauschers mit N,N′-bis-(2-hydroxybenzyl)-ethylendiamin als Ankergruppe auf der Basis von Polystyrol

The synthesis of a new polystyrene exchanger contaning N,N'-bis-(2-hydroxybenzyl)-ethylenediamine as anchor group is described. The anchor group is obtained by reaction of salicylaldehyde with ethylenediamine to N,N'-ethylene-bis-(salicyldiamine) = “Salen” and hydration of “Salen”. Polystyrene is nitrated, reduced, diazotated and coupled with N,N'-bis-(2-hydroxybenzyl)-ethylenediamine. The exchanger is characterized by determination of its anchor group content and its capacity, by measuring the rate of exchange and by determination of the distribution coefficients for Au³⁺, Pd²⁺, Pt⁴⁺, Cu²⁺, and Ni²⁺ ions.