Reactive Extraction of Lactic Acid, Formic Acid and Acetic Acid from Aqueous Solutions with Tri-n-octylamine/1-Octanol/n-Undecane

Mungma, Nuttakul; Kienberger, Marlene; Siebenhofer, Matthäus

doi:10.3390/chemengineering3020043

Cited by 26 publications

(22 citation statements)

References 35 publications

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“…It is also studied for reactive extraction of carboxylic acids. Results obtained in the present study using TBP were in good agreement with the literature: 46,57‐60

normalη % goodbreak= \frac{K_{normald}}{(K_{normald} + 1)} goodbreak\times 100

…”

Section: Resultssupporting

confidence: 91%

Butanol recovery using ionic liquids as green solvents

Motghare

Shende

Wasewar

2021

J of Chemical Tech & Biotech

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BACKGROUND Consistent rising energy demand due to depleting conventional resources leads to the development of alternative energy sources. Biobutanol is a promising fuel because of its high energy content. However, the fermentative technique of butanol generation by the acetone−butanol−ethanol procedure utilizing solventogenic Clostridium has serious constraints. It represses microbial movement (ordinarily ≥10 g L−1) and influences its production. To extricate butanol from aging broth, there are different separation techniques. To conquer these issues, ionic liquids can be utilized as novel extractants replacing ordinary unstable solvents. RESULTS In the present paper, separation of butanol (simulated) from aqueous media utilizing typical hydrophobic ionic liquids – 1‐hexyl‐3‐methylimidazolium bis(trifluoromethanesulfonimide) (HMIM[NTF2]), 1‐hexyl‐3‐methylimidazolium hexafluorophosphate (HMIM[PF6]) and other solvents; oleyl alcohol (OA), tri‐n‐butyl phosphate (TBP) and their blends – has been carried at 298 ± 1 K. Results were compared with TBP, which was taken as a conventional reference solvent. Extraction efficiency was observed in the range TBP > 85–87% for OA > 55–85 for HMIM[NTF2] > 26–66% for HMIM[PF6], respectively. From the equilibrium experiments, distribution coefficients (Kd) values were observed in the range of TBP (7–23) > OA (5–7) > HMIM[NTF2] (1.2–5.6) > HMIM[PF6] (0.36–1.94), respectively. CONCLUSION The present study shows how extractant–diluent combinations can be used to obtain a non‐toxic extractant to tune characteristics of ionic liquids and improve fluid properties by significantly increasing distribution coefficients and extraction efficiencies. This could be helpful for separation of butanol from aqueous phase. © 2021 Society of Chemical Industry (SCI).

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“…It is also studied for reactive extraction of carboxylic acids. Results obtained in the present study using TBP were in good agreement with the literature: 46,57‐60

normalη % goodbreak= \frac{K_{normald}}{(K_{normald} + 1)} goodbreak\times 100

…”

Section: Resultssupporting

confidence: 91%

Butanol recovery using ionic liquids as green solvents

Motghare

Shende

Wasewar

2021

J of Chemical Tech & Biotech

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“…12). The best results were obtained with the pair TOA/n-octanol, achieving an extraction yield of 97% and a distribution coefficient of 34, in agreement with previous works reporting the efficient extraction of FA from aqueous solutions using this extractant/diluent combination [18,20,21,22]. The combination of TOA with the other diluents caused a dramatic decrease in the extraction performance.…”

Section: Tablesupporting

confidence: 88%

Purification and concentration of formic acid from formic acid/gluconic acid mixtures by two successive steps of nanofiltration and reactive liquid-liquid extraction

Roncal

Lorenzo²,

Prieto-Fernández³

et al. 2022

Separation and Purification Technology

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A downstream process for the purification and concentration of formic acid (FA) from FA/gluconic acid (GA) mixtures, obtainable by a coupled biocatalytic reaction of CO 2 reduction and glucose oxidation, has been developed. The process involved two technologies: (i) a first nanofiltration (NF) step to separate FA and GA, and (ii) a second reactive liquid-liquid extraction (RLLE) step to concentrate FA. The NF process, using a Synder NFX membrane, consisted of three NF steps separated into two divergent lines, named permeate and retentate pathways. The first NF was common for both pathways, resulting in a permeate strongly enriched in FA and depleted in GA, and a retentate with opposite characteristics. In the permeate pathway, this first permeate was subjected to a second NF to obtain a 99.6% pure FA permeate. In the retentate pathway, an additional NF step on the first retentate resulted in a concentrated 99.4% pure GA retentate. The final diluted FA permeate was concentrated by RLLE using tri-N-octylamine as extractant in n-octanol, and a final back-extraction with NaOH. The optimized RLLE process involved a 100-fold volume decrease and resulted in a final FA solution (as sodium formate) of 174.5 g/L, 78 times more concentrated than the feed.

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“…The optimal K D for LA in our PEI/PAA CC system at approximately 100 mM NaCl is comparable to or greater than many other liquid–liquid extraction systems. 44,56–58 A disadvantage of some of these reported systems is their reliance on low pH 59 or the toxicity of the solvents. 58 While some established extraction methods, such as tri- n -octylamine in 1-octanol, 60 outperform CC systems with regard to LA for now, we show that the effects of system parameters for CC systems can substantially alter the K D .…”

Section: Resultsmentioning

confidence: 99%