Adsorption of Organic Acids on Weakly Basic ion Exchanger: Equilibria.

Takatsuji, Wataru; Yoshida, Hiroyuki

doi:10.1252/jcej.30.396

Cited by 22 publications

(26 citation statements)

References 12 publications

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“…Figs. 6 and 7 compare the equilibrium data of this work (indicated by bold lines) and also using similar data from some of the earlier works (Kunin, 1958;Adams et al, 1969;Bhandari et al, 1992Bhandari et al, , 1996Takatsuji & Yoshida, 1997;Husson & King, 1999a). In contrast to the earlier reports on the individual sorption equilibrium curves and isolated treatment of the same, it is now possible for us to have a clearer picture of sorption behaviour on di!erent weak base resins.…”

Section: Ewect Of Resin Basicitysupporting

confidence: 74%

Investigating the differences in acid separation behaviour on weak base ion exchange resins

Bhandari

Yonemoto

Juvekar

2000

Chemical Engineering Science

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Section: Ewect Of Resin Basicitysupporting

confidence: 74%

Investigating the differences in acid separation behaviour on weak base ion exchange resins

Bhandari

Yonemoto

Juvekar

2000

Chemical Engineering Science

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“…even for the acid with more than one carboxylic group in one molecule, such as citric acid [11]. In Eq.…”

Section: Methodsmentioning

confidence: 99%

“…The product can be then recovered by elution of the loaded bed. A survey of relevant publications and patents [1,2,3,4,5,6,7,8,9,10,11,12] shows that although the principles of organic acids separation by the ion-exchange method are known, there are still many details which need to be further developed in particular systems. Such effort seems to be justified, because the technology based on the ion-exchange method allows one to obtain pure products in a single adsorption/desorption operation and makes possible an integration of the biosynthesis process with product separation and purification.…”

Section: Introductionmentioning

confidence: 99%

Equilibrium and dynamic investigations of organic acids adsorption onto ion-exchange resins

Głuszcz

Jamroz

Sencio

et al. 2004

Bioprocess and Biosystems Engineering

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The aim of the study was to determine properties of selected ion-exchange resins for citric and lactic acids recovery, to define sorption isotherms for these acids at different temperatures (in the range of 20-60 degrees C) and to determine diffusion coefficients inside sorbent particles. A mathematical model of the ion-exchange process in the chromatographic column and its experimental verification is also presented. During investigations 18 types of ion-exchange resins were tested. It was found that weakly basic resins were more suitable for the recovery process than strongly basic ones. The best resin for the separation of citric acid was Amberlite IRA-67 and for lactic acid Amberlite IRA-92. As a result of transient-state sorption experiments diffusion coefficients of the citric acid inside the sorbent particle at different temperatures were obtained. It was found that D(p) increased with the temperature by two times in the range of 20-60 degrees C, and its value at 60 degrees C was 7.2 x 10(-10) m(2)/s. The proposed mathematical model was applied to identify bed operation parameters in the column for the needs of the simulated moving bed chromatography method.

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“…It was assumed that these organic acids were adsorbed by the neutralization reaction with the fixed amino group of the weakly basic resin. By applying scribed in the previous article (Takatsuji and Yoshida, 1997). Since the equilibria for the binary systems were fully reached in 7 days, the resin particles and the organic acid solutions were contacted for 7 days.…”

mentioning

confidence: 99%

“…21, respectively. The theoretical equations were derived in the previous article (Takatsuji and Yoshida, 1997) the mass action law and considering the material balance, theoretical equations for adsorption isotherms were derived. The experimental titration curves were compared with those theoretical equations.…”

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confidence: 99%