Reactive Extraction of Citric Acid from an Aqueous Fermentation Broth

Bauer, Ulrich; Marr, Rolf; Rückl, W.; Siebenhofer, Matthäus

doi:10.1002/bbpc.19890930911

Cited by 52 publications

(31 citation statements)

References 4 publications

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“…In a similar way, the Langmuir equilibrium model of Bauer et al 25 has been applied to relevant extraction systems along with considering an overall acid-extractant complexation with an associated number (z) relative to the maximum loading of the extractant,…”

Section: ( )mentioning

confidence: 99%

Optimal Reactive Extraction of Valeric Acid from Aqueous Solutions Using Tri- n -propyl amine/Diluent and Dibenzyl amine/Diluent Systems

Şenol

Bilgin

Başlıoğlu

2016

Chem.Biochem.Eng.Q.

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Reactive extraction of valeric acid from water by tri-n-propyl amine (TPA) and dibenzyl amine (DBA) dissolved in polar oxygenated aliphatic diluents (diethyl sebacate, diethyl succinate, diethyl malonate, ethyl caprylate, ethyl valerate and isoamyl alcohol) has been studied at 298 0.2 K T = ± and P 101.3 0.7 kPa p = ± . Distribution data have been subjected to formulation of an optimization structure for effective acid separation. The optimization approach uses separation ratio R and synergistic enhancement SE factors to efficiently identify optimum extraction ranges. Among the examined alipha tic ester and alcohol diluents, monoesters exhibit higher solvation efficiency comprising acid 1 -amine 1 complex formation, while isoamyl alcohol yields larger loading factors. The uptake capacity of the amine/diluent system is ranging in the order TPA > DBA.Modeling efforts based on the mass-action law principles have shown considerable success. The mass action law chemodel and modified Langmuir approach are quite accurate yielding mean errors of 0.9 % and 0.7 %, respectively.

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Section: ( )mentioning

confidence: 99%

Optimal Reactive Extraction of Valeric Acid from Aqueous Solutions Using Tri- n -propyl amine/Diluent and Dibenzyl amine/Diluent Systems

Şenol

Bilgin

Başlıoğlu

2016

Chem.Biochem.Eng.Q.

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“…The recovery of citric acid from fermentation broth is one of important steps in a commercial process of citric acid production, especially from dilute solutions. Now, the only commercially viable technique on large-scale processes is precipitation technique using calcium salt followed by filtration and subsequently treated with sulphuric acid, but the common calcium salt precipitation process for isolation of citric acid produces 2.5 tons of waste per ton of citric acid [1][2][3][4]. Other recovery methods for this purpose, such as, solvent extraction, ionic exchange, absorption, electrodialysis, membrane separation, etc., encounter various difficulties [1,2].…”

Section: Introductionmentioning

confidence: 99%

Mass transfer characteristics of citric acid extraction by hollow fiber renewal liquid membrane

Ren

Zhang

et al. 2009

Chemical Engineering Journal

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“…In the final step, the acid is crystalized and dried. The main problem, associated with this process, is the requirement of resins to purify liquid phases and the huge amount of calcium sulfate generated [2]. Thus, alternative processes for citric acid recovery and purification from fermented musts have been developed.…”

Section: Introductionmentioning

confidence: 99%

“…Bauer et al [2] believe that the complexation reaction occurs with the citrate ions and trialkylamine in MIBK by an ionic association mechanism. Bízek et al [17], in their work with trialkylamine in MIBK, observed that both of the previously cited cases could occur simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Solvent Extraction of Citric Acid with Different Organic Phases

Araújo¹,

Coelho²,

Balarini³

et al. 2017

ACES

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The present work aimed at the study of citric acid solvent extraction in order to establish the composition of the organic phase and to obtain thermodynamic and kinetic data for the chosen system. Discontinuous extraction experiments in a single stage were performed from a synthetic solution of citric acid, with the typical concentration (10% w/v) observed in industrial fermented musts. Exploratory experiments were carried out using different organic phases in order to select the most suitable solvent phase to further continuous extraction tests in a mechanically agitated column. The selected organic phase composition was: Alamine ® 336, Exxal ™ 13 tridecyl alcohol, and the aliphatic diluent Escaid TM 110. Next, the effects of the contact time and of the concentrations of extractant and modifier on the citric acid extraction were studied. Among the investigated conditions, the best one was 10 minutes of contact time, 30% w/v of Alamine ® 336, and 10% w/v of Exxal ™ 13 tridecyl alcohol. For this condition, the equilibrium isotherm (28˚C ± 2˚C) was determined, and the equilibrium constant was calculated ( ). It was considered that trioctylamine and citric acid complexation reaction occurs mainly with non-dissociated citric acid form, because the aqueous feed solutions' pH is lower than the citric acid pK a1 . It was found that 1.5 molecules of the extractant, on average, are required to react with one citric acid molecule, which can indicate that reactions with different extractant/citric acid ratios occur simultaneously. Next, the rate constants for the direct and inverse reactions, 2.10 (mol•L , respectively, were calculated. Coefficients of determination (R 2 ) values higher than 0.93 were found in these calculations, suggesting that the results obtained using a computer modeling would be very close to those results obtained experimentally. Therefore, the present work provides data required to future modelling, design, and simulation of citric acid solvent extraction processes.How to cite this paper: Araújo, E.M.R.,

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Reactive Extraction of Citric Acid from an Aqueous Fermentation Broth

Cited by 52 publications

References 4 publications

Optimal Reactive Extraction of Valeric Acid from Aqueous Solutions Using Tri- n -propyl amine/Diluent and Dibenzyl amine/Diluent Systems

Optimal Reactive Extraction of Valeric Acid from Aqueous Solutions Using Tri- n -propyl amine/Diluent and Dibenzyl amine/Diluent Systems

Mass transfer characteristics of citric acid extraction by hollow fiber renewal liquid membrane

Solvent Extraction of Citric Acid with Different Organic Phases

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