Preparation and chelating properties of 8-hydroxy-quinoline—formaldehyde polymers

Condensation of 8-hydroxyquinoline with formaldehyde in acid solution yielded a polymer of molecular weight ∽3300. Modification of this polymer with resorcinol resulted in improved physical properties of this material. 8-Hydroxyquinoline-formaldehyde polymers can be used as selective chelating ion-exchange rains which permit separation of various cations. The polymeric metd chelates are thermally less stable than the unchelated polymer.