Separation of Metals on Sulfonated Diphenyl Phosphonate-Furfural Resin

Abstract

The cation exchanger was prepared by sulfonation of diphenyl phosphonate-furfural resin and the elution behavior of metal ions on this resin was investigated in HC1 and HCl-acetone solution. The ion exchange capacity of the dry resin in the hydrogen form is at the range of 0.7 to 2.5 meq/g-R, depending on the conditions of sulfonation. At HCI solution, the onl y separations of Cd²⁺ and Pb²⁺ ions are possible by elution with 0.20 moll HCI. At HCI-acetone media, Cu²⁺, Cd²⁺, Zn²⁺ and Pb²⁺ ions were eluted in that order with 0.05 mol/l HCI-80 vol%acetone medium. Cu²⁺ can be separated from Zn²⁺ or Pb²⁺ each by elution with 0.015 moli/HCI-80 vol% acetone medium and so does Cu²⁺ from Cd²⁺ with 0.01 molt/ HCI-80 vol% acetneo medium.