Selective sorption of alkali-metal cations by carboxylic acid resins containing acyclic or cyclic polyether units

Novel ion-exchange resins have been prepared by condensation polymerization with formaldehyde in formic acid of three polyether carboxylic acids which possess two benzo group substituents. The selectivities and efficiencies of competitive alkali-metal cation sorption from aqueous solutions by these...

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Bibliographic Details
Published in:Analytical chemistry (Washington) 1990-11, Vol.62 (21), p.2283-2287
Main Authors: Hayashita, Takashi, Goo, Mi Ja, Lee, Jong Chan, Kim, Jong Seung, Krzykawski, Jan, Bartsch, Richard A
Format: Article
Language:English
Subjects:
400105 - Separation Procedures
ALKALI METALS
AQUEOUS SOLUTIONS
CARBOXYLIC ACIDS
Chemistry
DATA
DISPERSIONS
ELEMENTS
Exact sciences and technology
EXPERIMENTAL DATA
General and physical chemistry
INFORMATION
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
ION EXCHANGE MATERIALS
MATERIALS
MEASURING METHODS
METALS
MIXTURES
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
SODIUM
Solid-liquid interface
SOLUTIONS
SORPTION
Surface physical chemistry
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Summary:Novel ion-exchange resins have been prepared by condensation polymerization with formaldehyde in formic acid of three polyether carboxylic acids which possess two benzo group substituents. The selectivities and efficiencies of competitive alkali-metal cation sorption from aqueous solutions by these polyether carboxylic acid resins are strongly influenced by (1) the pH of the aqueous solution, (2) the acyclic or cyclic nature of the polyether unit, and (3) the conformational positioning of the carboxylic acid group in the resins derived from cyclic polyether (crown ether) compounds. Good sorption selectivity for Na{sup +} was observed for dibenzo-16-crown-5 resin 3 in which the pendant carboxylic acid group is oriented over the polyether cavity. Resin 3 was utilized as a stationary phase for selective column concentration of Na{sup +} from dilute aqueous solution.
ISSN:0003-2700
1520-6882
DOI:10.1021/ac00220a006