AbstractIon exchange treatment of water for boiler and process systems is a documented, proven unit operation. The recent development of a group of novel resins has expanded the potential use of ion exchange processes to a new range of applications. By applying a different functional group onto the traditional styrene/divinyl‐benzene polymer backbone, ion exchange technology becomes a cost‐effective treatment option for metals removal from plant process that and waste streams. This paper will report on the use of a diphosphonic acid functional group ion exchange resin in a number of industrial applications. Key performance characteristics of the material include:Superior Reactivity: The diphosphonic acid functional group incorporated into the resins reacts more completely with metal ions in solution, lowering effluent metals concentrations.Selectivity: While reacting with metal ions, diphosphonic acid functionalized resin capacity is not consumed by common earth elements such as calcium, magnesium and sodium. By selectively applying capacity to target metals, the number of regenerations required is dramatically reduced, improving system cost‐effectiveness.Kinetics: The diphosphonic acid functionalized resin also includes a second functional group, sulfonic acid, as is used in most industrial cation exchange resins. The inclusion of sulfonic acid groups improves ion access to the diphosphonic acid exchange sites, improving exchage kinetics over other specialty resin types. Suprior kinetics allows for a smaller resin bed, saving on both equipment and resin purchase costs.Each industrial application cited applies these performance characteristics in such a way to allow for new or improved system perfor
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