Abstract
A crosslinked chelating ion exchange resin containing two iminodiacetic acid (IDA) groups per s-triazine ring was readily synthesized in a batch reaction from IDA, cyanuric chloride (CC) and poly( p-aminostyrene) (PAS) or polyethyleneimine (PEI). A two-step reaction involving the reaction between IDA and CC as the first step and that between the intermediate product and PAS as the second step gave best results with respect to resin yield and metal uptake. Other reaction procedures and some attempts to prepare a porous resin gave lower yield and metal uptakes. Interfacial condensation was used to synthesize PEI-containing resins (PEIC) and gave products with higher metal uptake but in lower yield. Yield, properties, and practical usefulness of the products were compared with those of other resins.
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