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Submitted to: Journal of Applied Polymer Science
Publication Type: Peer Reviewed Journal Publication Acceptance Date: 1/23/1997 Publication Date: N/A Citation: N/A Interpretive Summary: Ion exchange resins are widely used to recover metals from industrial waste streams, to remove noxious materials from the effluents produced during food and chemical processing and in large water treatment applications. Because of variations in the character of the waste streams, one do-it-all material or method is improbable. Resins with different selectivity properties are needed to cope with the wide variety of problems encountered. The most commonly used cation exchangers are based on sulfonated polystyrene; a petroleum derived product. Phytic acid is a renewable resource readily available in ton quantities from corn and rice processing. Current research indicates that this material can be converted into a phosphate-based ion exchange resin having capacities comparable to currently available resins and a different selectivity range. Technical Abstract: A series of water-insoluble cation exchange resins was produced by heating a commercial phytic acid solution with a group of materials containing multiple hydroxyl functionality. Polymeric-, oligomeric- and monomeric-organic materials, and agricultural residues, as well as some polymeric inorganics such as silica and powdered glass, were heated with phytic acid at 180 deg C for 20-30 min in vacuo. The brown to black material produced had an ion exchange capacity for calcium from 0.78 to 5.7 meq/g. |
