Gel Impregnated Resins

High polymers swell and form gels when they are soaked in solubility-consistent organic solvents. Cross-linkage can limit the swelling and prevent the polymer from being entirely dissolved in the solvent. If the organic 

Applications of Liquid Gel Impregnated Resins in Metal Extraction Processes 

Despite extensive studies and applications of liquid-liquid extraction, only a few papers have appeared that deal with the extraction of metals by liquid-hydrophobic gels. Typical examples are the extraction of U(Vl), Th(IV), 

Ce(III), and Co(II) with styrene-divinylbenzene swollen with di-(2-ethyl-hexyOphosphoric acid [189-191], and only a few papers, mainly for analytical purposes, are available [188,192]. 

Extracting hydrophobic gels prepared by swelling cross-linked polybutadiene with solutions of 4-acylpyrazol-5-one (HL) in toluene, chloroform, and carbon tetrachloride were used for copper extraction studies [192]. The metal distribution curves, close to those obtained in the pure liquid-liquid extraction systems, show that the polymer has no effect on the thermodynamics of the liquid-gel extraction, as shown in Fig. 43. Kinetic studies 

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