Bifunctional phenyl monophosphonic/sulfonic acid ion exchange resin and process for using the same

US6488859B2 · kind B2 · utility

Assignees

• Arch Development Corporation · US
• University of Tennessee Research Foundation · US

Inventors

• Spiro D. Alexandratos · Knoxville, US
• Christopher Shelley · Cincinnati, US
• E. Philip Horwitz · Naperville, US
• Renato Chiarizia · North Chicago, US
• Michael J. Gula · Chicago, US
• Sui Xue · Darien, US
• James T. Harvey · Chatswood, AU

Key dates

• Filing date: May 7, 2001
• Grant date: Dec 3, 2002
• Expiry date: May 7, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J5/20
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A cross-linked water-insoluble ion exchange resin comprised of polymerized monomers having a phenyl ring is disclosed. A contemplated resin contains (i) polymerized phenyl ring-containing monomers having a phosphonic acid ligand linked to the phenyl ring, (ii) about 2 to about 5 millimoles per gram (mmol/g) of phosphorus as phosphonic acid ligands, and (iii) a sufficient amount of a sulfonic acid ligand such that the ratio of mmol/g of phosphonic acid to mmol/g sulfonic acid is up to 3:1. A process for removing polyvalent metal cations from aqueous solution, and a process for removing iron(III) cations from acidic copper(II) cation-containing solutions that utilize the contemplated resin or other resins are disclosed.