Separation of titanium, iron and aluminium on a chelating resin with benzoylphenylhydroxylamine group and application to bauxite and clay

Summary A chelating polystyrene based resin containing N-benzoyl-N-phenylhydroxylamine has been sythesized by two methods and characterized. Conditions for quantitative separation of Ti(IV), Fe(III) and Al(III) on the resin have been studied. A method has been developed for the determination of these three metal ions in bauxite or clay samples after their separation on the resin with recoveries of 98.5–99.5% for different metal ions. The maximum sorption values are observed at pH 1, 2.5 and 2.5 for Ti(IV), Fe(III) and Al(III), respectively, which are recovered by successive elution with 1 mol/l H₂SO₄, 2 mol/l HCl and 4 mol/l H₂SO₄ in the above order.