Equilibrium studies on lactic acid extraction with N,N-didodecylpyridin-4-amine (DDAP) extractant

Krzyzaniak, A Agnieszka; Schuur, Boelo; Haan, A.B. de

doi:10.1016/j.ces.2014.01.030

Cited by 64 publications

(59 citation statements)

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“…vegetable oils (17)(18)(19)(20) have been used for organic phase formation. Moreover, novel extractants have recently been used instead of conventional extraction agents (21)(22)(23)(24). It has been shown that reactive extraction is applicable for separating carboxylic acids of similar structures from their mixed solutions (25).…”

Section: Introductionmentioning

confidence: 99%

Solvent modification effect on the physical and chemical extraction of acetic acid

Martı

2016

Separation Science and Technology

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Combined use of inert diluents with polar modifiers enables former to be utilized for the recovery of polar value-added chemicals. The results show that polarities of both solvent and modifier are critical for efficient separations. Thus, K D values with 1-octanol were higher than those with 1-decanol; while those with xylene were superior to those with hexane and toluene.Increasing amine concentrations increased the K D values, in contrast to the trends with pH and temperature. About 33%, 79% and 67% of acetic acid was recovered using 25% (v/v) Alamine 336 in xylene, 1-octanol and 30% 1-octanol-modified xylene, respectively.A c c e p t e d M a n u s c r i p t 2 Therefore, solvent modification positively affects the extraction power of inert diluents for acetic acid recovery.

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Section: Introductionmentioning

confidence: 99%

Solvent modification effect on the physical and chemical extraction of acetic acid

Martı

2016

Separation Science and Technology

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“…[5][6][7][8][9][10][11] Over the past few years, commercial supramolecular complexation agents like Alamine 336, N,Ndidodecylpyridin-4-amine, trialkylphosphine oxide, di(2-ethylhexyl)phosphoric acid, phosphonium-based ionic liquids and sustainable low molecular weight extractants have been extensively employed as attractive carriers for the acid separation. [12][13][14][15][16][17] These carriers possess hydrophilic cavities and interactive abilities that enable them to incorporate acid molecules from the aqueous solution with a high product purity and yield. [12][13][14][15][16][17] A survey of the literature reveals that the equilibrium characteristics of reactive extraction systems are very sensitive to the types and concentrations of the acid, carrier and diluent, temperature, the aqueous phase pH and the third-phase formation.…”

Section: Introductionmentioning

confidence: 99%

Optimization of reactive extraction of C1–C4 aliphatic monocarboxylic acids from aqueous solutions: modeling solvation effect with extended‐LSER, A‐UNIFAC and SPR

Şenol

Çehreli

Özparlak

et al. 2017

Asia-Pacific J Chem Eng

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This paper studies reactive extraction of formic (FA), acetic (AA), propionic (PA) and butyric (BA) acids from aqueous solutions by tri‐n‐butyl amine/diluent, with particular focus on proper optimization and modeling of extraction equilibria. The uptake capacities of amine/diluent and diluent alone approximate the following order: oleyl alcohol > octyl acetate > diisobutyl ketone and BA > PA > AA ≈ FA. An intrinsic optimization structure has been applied to the description of optimum extraction field of relevant systems, based on analyzing the variation profiles of separation ratio R and synergistic enhancement SE factors through the derivative variation method. We present new solvation molecular models extended‐linear solvation energy relation (e‐LSER), SPR1 and SPR2 (solvation probability relation), and an extension to group‐contribution approach A‐UNIFAC (Association‐UNIFAC). A‐UNIFAC predicts phase equilibria using new group interaction parameters regressed from vapor‐liquid equilibrium data. The e‐LSER model involves eight descriptors used for expressing solvent effects. By performing SPR1 and SPR2, we are able to scale up the probability range and activation energy of solvation effect. The strength of acid‐amine association is calculated with chemodel. e‐LSER, A‐UNIFAC, SPR and chemodel simulate accurately the observed performance with average deviations inferior to 4.8%, 24.1%, 0.8% and 16.2%, respectively. © 2017 Curtin University and John Wiley & Sons, Ltd.

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“…A similar combined temperature swing and diluent swing back-extraction was suggested by Krzyzaniak et al for a HAc extraction process using N,N-didodecyl pyridin-4-amine (DDAP) diluted in n-octanol as a composite solvent. [96] However, severe solvent-HLa interaction resulted in the need for a high regeneration temperature of 140 °C.…”

Section: Temperature and Diluent Swingmentioning

confidence: 99%

“…As a result, the majority of the carboxylic acids are in their carboxylate forms, whereas their neutral acidic forms are preferred for extraction, since they are the only forms extracted by the majority of organic solvents. [23,[93][94][95][96] As an example, during fermentative production of lactic acid (HLa), addition of CaO or Ca(OH) 2 leads to formation of calcium lactate. Prior to extraction, the solution is acidified with H 2 SO 4 to convert lactate to extractable HLa.…”

Section: Process Innovationsmentioning

confidence: 99%

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Separation of waste-derived volatile fatty acids from fermented wastewater

Reyhanitash¹

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General introductionNowadays, the origin of most of the materials used by a person everyday can be traced back to petroleum. This makes petroleum the very central point around which a person's daily life is orbiting. The obvious downside of this close relationship is a quicker depletion of petroleum resources. The consequences of this depletion can even be as catastrophic as turning petroleum into a tool that creates tension between various communities around the world. An example of essential petroleum-derived materials is polymers. They are the major building blocks of the world we have built in the 21 st century and call it home. Volatile fatty acids (VFAs), fatty acids of six or fewer carbon atoms [1], are among the ingredients of common polymers. They serve as food and feed preservers as well. To reduce reliance on petroleum resources, one may start with reducing petroleum-derived chemicals that are in high demand. Reducing of course means proposing an alternative resource and production route. VFAs are produced at tremendous rates mainly by petrochemical routes [2], and therefore, they seem to be good candidates. Acetic, propionic and butyric acids are the most common VFAs, and at a total production rate of about 11.5 × 10 6 t/a, they account for about 50 % of the global short organic acids (up to C 6 ) market.[2] The current capacity of anaerobic digestion in Europe is about 9 × 10 6 t/a of organic fraction of municipal solid waste. [3, 4] Assuming that municipal solid waste is entirely convertible to glucose, and a high glucose to acetic acid yield of 0.8 g/g is achievable [2], biological acetic acid can be produced at a rate of 7.2 × 10 6 t/a. This value clearly shows that, by utilizing only the waste streams that are generated in Europe as fermentation feed, a very large fraction of the global acetic acid demand can potentially be met.A great deal of study has been invested on assessing various alternative resources and production routes for VFAs, and they seem to have reached a common conclusion that waste streams and fermentation are promising alternative resources and production route respectively. [1, 2,[5][6][7] Utilizing waste as the resource comes with an extra bonus which is replacing the approach of treatment to meet environmental regulations with treatment to produce value-added chemicals. Fermentation is a potential route to produce various chemicals at a low cost and high efficiency.[8] Furthermore, since numerous types of microorganisms are available to be used for fermentation, a wide variety of chemicals can be produced by fermentation. [2, 9] In the literature, several examples of production of VFAs by fermentation have been reported with resources ranging from industrial wastewater to newspaper waste. [5-7, 10, 11] 3An unfortunate limitation of fermentation is the low VFA content of the resulting broths, as the initial waste streams are often poor in carbon. This limitation poses a major bottleneck to a process that is to deliver highly concentrated waste-derivedVFAs. This neces...

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Equilibrium studies on lactic acid extraction with N,N-didodecylpyridin-4-amine (DDAP) extractant

Cited by 64 publications

References 53 publications

Solvent modification effect on the physical and chemical extraction of acetic acid

Solvent modification effect on the physical and chemical extraction of acetic acid

Optimization of reactive extraction of C1–C4 aliphatic monocarboxylic acids from aqueous solutions: modeling solvation effect with extended‐LSER, A‐UNIFAC and SPR

Separation of waste-derived volatile fatty acids from fermented wastewater

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