ion exchanger


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an·i·on ex·chang·er

(an'ī-on eks-chānj'ĕr),
An insoluble solid, usually a polystyrene or a polysaccharide, with cation groups (for example, -NR3+ or -NR2H+), which can attract and hold anions that pass by in a moving solution in exchange for anions previously held.

ion exchanger

n.
A polymer containing charged groups to which other charged mobile ions become attached or replaced, used in chromatography.
References in periodicals archive ?
In addition, the sensing method by using the ion exchanger is possible to keep high activity of the biological materials.
These hybrid ion exchangers have excellent attrition resistance and sorption properties [25 26].
In this ion exchanger, ion exchange functional groups, such as sulfo groups for cation exchanger or quaternary ammonium groups for anion exchanger, are located not only on the surface but in the entire polymer as shown in Fig.
Synthesis ion exchangers by chemical transformation of products of polycondensation of furfural and halogenbenzyls
Various ion exchangers, discussed in the section on ion exchange materials, are used for softening and also for removing other minerals in solution.
The production of ultrapure water for the pharmaceutical or semiconductor industries requires high-quality ion exchangers.
Dahlberg predicts that the bipolar machines will eventually be the replacement for ion exchangers in the "big box" wineries.
Reversed phase, normal phase, Florisil DVB, mixed-mode, graphitized carbon, size exclusion, drying media and a line of ion exchangers provide selectivity options for any application.
Dragan (Institute of Macromolecular Chemistry, Romania) collects information from the literature as well as original contributions in the field of ionic (co)polymers and hybrids such as self-assembled multilayers, ionic polymers containing azobenzene chromophore, phase separation processes, chelating ion exchangers, polymer electrolytes, functionalized solid surfaces, ionic hybrid hydrogels, and nanocomposites for polymer electrolytes.
Sixteen chapters cover subjects such as bioseparations using hollow fibres, extraction techniques, bioseparations with supercritical fluids, scale-up techniques, precipitation of biomolecules, foam-based separation of proteins, eletrophoresis, affinity chromotography, membrane separation, microfiltration in the drying process industry, whey protein isolation and fractionation using ion exchangers, separation processes in flavour manufacture, separation and purification processes for the recovery of industrial enzymes, and finally novel processes for the recovery of high-purity glucose isomerases.
Reversed phase, normal phase, Florisil, DVB, mixed-mode, graphitized carbon, size exclusion, drying media and a line of ion exchangers provide selectivity options for any application.
Until now, inefficient ion exchangers that leaked materials into the process stream were the only option for removing large quantities of radioactive wastes.