Fibrous weak-base anion exchangers from a polybenzimidazole staple for the extraction of gold cyanide

Kotze, M.; Green, B.R.; Ellis, Peter F.

doi:10.1016/0923-1137(91)90271-o

Cited by 6 publications

(1 citation statement)

References 3 publications

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“…When dimethylglyoxime is attached to polybenzimidazole (Figure 27), the polymer shows binding constants in the order Co 2+ > Fe 3+ > Cu 2+ , Ni 2+ > Mn 2+ > UO 2 2+ although the loading capacities are quite low (Chanda and Rempel, 1989). Other ligands have been attached to polybenzimidazole to yield selective resins (Chanda and Rempel, 1990a/1992bKotze et al, 1991).…”

Section: Selective Polymer-supported Reagentsmentioning

confidence: 99%

Polymer-Supported Reagents: Application to Separation Science

Alexandratos

Crick

1996

Ind. Eng. Chem. Res.

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The purpose of this review is to highlight new ligands that have been immobilized on polymers to form polymer-supported reagents which are selective for the complexation of targeted metal ions from multicomponent solutions. Polystyrene remains the most popular organic polymer support, and its synthesis by suspension polymerization yields beads with a diameter appropriate for large-scale applications. Immobilized ligands include amines, pyridines, imidazoles, oximes, hydroxylamines, Schiff bases, thiols, crown ethers, and a varity of phosphorus ligands. The concepts inherent to reactive ion exchange, as first described by Helfferich, and the recently synthesized dual mechanism bifunctional polymers can be used to build a unified theory of selectivity with polymer-supported reagents. The goal remains to engineer selectivity into polymeric reagents in an a priori manner by understanding the basic principles through which a polymeric reagent can recognize a targeted substrate.

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Section: Selective Polymer-supported Reagentsmentioning

confidence: 99%