Studies on Amidinourea Resins with Metal-ion-capturing Function

Hatanaka, Masashi; Hoshi, Makoto; Shiba, Ryuichi

doi:10.1295/koron.63.745

Cited by 6 publications

(8 citation statements)

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“…In polymer complexes, such as chelate resins, there exist pure adsorption and desorption processes between the ions and ligands . So, we first introduced the time dependence of simple Langmuir terms.…”

Section: Theoreticalmentioning

confidence: 99%

“…As another application, we analyzed an ion‐exchange reaction of an amidinourea resin. The resin was loaded with CuCl 2 , and the copper ions were exchanged with hydrochloric acid at various concentrations . The copper ions were exchanged with protons at the Schiff‐base site to form a stable 1:1 hydrochlorate.…”

Section: Applicationmentioning

confidence: 99%

“…The sample was trimethylamidinourea resin with a polystyrene skeleton. Details of the synthesis and ion‐chromatograph measurements were given in a previous article . The resins used were globularized into about 50 mesh by suspension polymerization under poly(vinyl alcohol) .…”

Section: Applicationmentioning

confidence: 99%

“…The resin was loaded with CuCl 2 , and the copper ions were exchanged with hydrochloric acid at various concentrations. 14 The copper ions were exchanged with protons at the Schiff-base site to form a stable 1:1 hydrochlorate. Figure 8 shows the experimental data.…”

Section: Articlementioning

confidence: 99%

“…As shown in Figure , the percentage of Cu(II) adsorption is very sensitive to the arrangement of hydrophilic and hydrophobic substituents around the amidino group . These resins adsorb Cu(II) selectively at the Schiff‐base moiety . Although substitution by alkyl and benzyl groups (resins 1–6) leads to a decrease in the adsorption efficiency because of the corresponding steric hindrance and hydrophobic regions, substitution by pyrrolidil and piperidil groups (resin 7 and 8) leads to an increase in the adsorption efficiency, in which the spread of hydrophilic region overcomes the steric‐hindrance effects.…”

Section: Introductionmentioning

confidence: 99%

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Ion‐exchange kinetics based on film theory

Hatanaka

Hoshi

2013

J of Applied Polymer Sci

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The ion‐exchange kinetics in polymer complexes was theoretically formulated. The regeneration of metal species from an ion‐exchange or chelate resin was described as a competitive reaction between metal ions and protons. We considered the ion‐exchange terms and the Langmuir terms to describe the rate of reaction, and film diffusion was also taken into account to describe the profile of the kinetics. In contrast to early methods, the surface concentrations were determined so that the rates of the chemical reactions and diffusion were self‐consistent. Although in the initial stage ion exchange was controlled by diffusion, in the last stage ion exchange was controlled by chemical reactions, particularly under excess acid. The kinetics were supported by experimental data for an iminodiacetic acid chelate resin and amidinourea resins. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 39358.

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Section: Theoreticalmentioning

confidence: 99%

Section: Applicationmentioning

confidence: 99%

Section: Applicationmentioning

confidence: 99%

Section: Articlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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