Selective recovery of pyruvic acid from two and three acid aqueous solutions by reactive extraction

Martı, Mustafa Esen; Gürkan, Türker

doi:10.1016/j.seppur.2015.09.067

Cited by 29 publications

(37 citation statements)

References 56 publications

(150 reference statements)

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“…It was shown that the recovery with reactive extraction was significantly influenced by the concentration and type of the acid (Gu et al, 1998;Martı et al, 2011;Martı and Gürkan, 2015). Figure 3 shows that the recovery efficiencies were influenced in different ways by initial FA concentrations when octanol or SFO was selected as the organic phase diluent.…”

Section: Effect Of Acid Concentrationmentioning

confidence: 99%

Recovery of Formic Acid by Reactive Extraction Using an Environmentally-Friendly Solvent

Martı¹

2017

Scitech

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Today many carboxylic acids are recovered from biological production media and industrial wastewaters. Reactive extraction is favored over other separation methods due to its high recovery efficiency, ease of operation, low energy demand and reduced cost. However, use of toxic organic diluents in the organic phases is the main disadvantage of the method. In this study, the appropriateness of an environmentally-friendly solvent, sunflower oil (SFO) to be used as organic phase diluent during the recovery of formic acid (FA) from aqueous solutions by reactive extraction was evaluated. Alamine-336 was used as the extractant and the results obtained with SFO were compared with those obtained using octanol. The separation process reached an equilibrium in 3 hours and the recovery efficiency increased with the increase in extractant percentages. The initial FA concentration positively influenced the recovery when SFO was used as the diluent. In the ranges of the parameters studied, the highest recovery values were 98.6% and 82.6% with octanol and SFO, respectively. This study shows that low molecular weight carboxylic acids, e.g. FA can be recovered from aqueous solutions by reactive extraction using environmentally-friendly solvents such as SFO. Key Words: Formic acid, Reactive extraction, Sunflower oil, Alamine-336, EquilibriumFormik Asidin Çevre Dostu Bir Çözücü Kullanılarak Tepkimeli Özütleme Yöntemi ile Geri Kazanımı ÖZ: Günümüzde pek çok karboksilik asit biyolojik üretim ortamlarından ve endüstriyel atık sulardan geri kazanılmaktadır. Tepkimeli özütleme, yüksek geri kazanım verimi, işlem basitliği, düşük enerji gereksinimi ve maliyeti nedeniyle diğer ayırma yöntemlerine tercih edilmiştir. Fakat organik fazlarda zehirli organik seyrelticilerin kullanımı yöntemin en önemli dezavantajıdır. Bu çalışmada çevre dostu bir çözücünün, ayçiçek yağının formik asidin sulu çözeltilerinden tepkimeli özütleme yöntemi ile geri kazanımı sırasında organik faz seyrelticisi olarak zehirli organik kimyasallar yerine kullanımı değerlendirilmiştir. Özütleyici olarak Alamine-336 kullanılmış ve ayçiçek yağı ile elde edilen sonuçlar oktanol ile elde edilen sonuçlarla karşılaştırılmıştır. Ayırma süreci 3 saatte dengeye ulaşmış ve geri kazanım verimi özütleyici yüzdesi ile birlikte artmıştır. Ayçiçek yağı seyreltici olarak kullanıldığında başlangıç asit derişimi geri kazanımı pozitif yönde etkilemiştir. Çalışılan değişken aralıklarında oktanol ve ayçiçek yağı ile en yüksek geri kazanım verimleri sırasıyla %98,6 ve %82,6'dır. Bu çalışma formik asit gibi düşük molekül ağırlıklı karboksilik asitlerin tepkimeli özütleme ile ayçiçek yağı gibi çevre dostu çözücüler kullanılarak sulu çözeltilerden geri kazanılabileceğini göstermiştir.

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Section: Effect Of Acid Concentrationmentioning

confidence: 99%

Recovery of Formic Acid by Reactive Extraction Using an Environmentally-Friendly Solvent

Martı¹

2017

Scitech

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“…Long chain aliphatic tertiary amines, e.g., TOA, Alamine 336 and Alamine 308, extract carboxylic acids via ion pair formation with the undissociated form of the acid. Thus, reactive extraction using tertiary amines is strongly influenced by the initial pH of the aqueous solution (4,9,(25)(26)(27)(28).…”

Section: Aqueous Ph Effectmentioning

confidence: 99%

“…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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“…By combining the beneficial attributes of an extraction and a reaction, the distribution behavior within a liquid-liquid extraction can be favored towards a selective recovery of the product. In the respective case this is achieved by introducing a water insoluble amine, building a hydrophobic complex with the acid, which can then be extracted into an organic phase [10][11][12][13][14]. Reactive extraction of dicarboxylic acids has been shown to be applicable for various dicarboxylic acids, e.g.…”

Section: Introductionmentioning

confidence: 99%

Recovery of cis,cis-muconic acid from organic phase after reactive extraction

Gorden

Zeiner

Sadowski

et al. 2016

Separation and Purification Technology

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Selective recovery of pyruvic acid from two and three acid aqueous solutions by reactive extraction

Cited by 29 publications

References 56 publications

Recovery of Formic Acid by Reactive Extraction Using an Environmentally-Friendly Solvent

Recovery of Formic Acid by Reactive Extraction Using an Environmentally-Friendly Solvent

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

Recovery of cis,cis-muconic acid from organic phase after reactive extraction

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