Using eco-friendly alternatives for the recovery of pyruvic acid by reactive extraction

Martı, Mustafa Esen; Zeidan, Hani

doi:10.1016/j.seppur.2023.123309

Cited by 8 publications

(27 citation statements)

References 87 publications

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“…A similar trend was observed for the complex extraction of propionic acid and acrylic acid from aqueous solutions using natural diluents as organic phase diluents. , However, when 1-octanol was used in the organic phase, the efficiency was reduced as the amount of acid in the aqueous phase increased (Figure b). The trends were consistent with the previous complex extraction reports carried out using vegetable oils and alcohols. − …”

Section: Resultssupporting

confidence: 91%

“…As SFO cannot recover LA without TOA, all LA molecules in the organic phase are complexed with TOA through ion pair formation. 28,35,55 The z value increased with the increase in equilibrium concentration of LA in the aqueous phase. When LA molarity was ≤0.4, the z values were <0.4, and the TOA concentration had no effect on the loading ratio, consistent with the literature.…”

Section: Effect Of Concentrationmentioning

confidence: 95%

“…The strength of the bond is dependent upon the stability of the partially charged proton donors and acceptors. ,, If the extractant has a greater basicity than the anion of the solute, complex extraction of protonated carboxylic acids with aliphatic tertiary amines involves the ion pair formation between these molecules and transfer of the target molecule to the organic phase (eq ) − and the complexation constant can be calculated using eq . Thus, concentration of the undissociated or protonated acid portion in the aqueous medium plays a key role in the extraction with aliphatic amines. , Extraction performance of the process was evaluated by the extraction efficiency ( E (%)) and distribution coefficient ( K D ) as expressed in eqs and , respectively. HL aq + TOA org ⇄ false( HL − TOA false) org K E = false[ false( HL − TOA false) org false] [ ( HL ) aq ] · [ ( TOA ) org ] E ( % ) = [LA] org [LA] o × 100 K D = [LA] org [LA] aq …”

Section: Theorymentioning

confidence: 99%

“…The acid transferred to the organic phase must be recovered from this medium. Contacting an aqueous solution having a pH higher than the p K A of the target acid with the organic phase containing the acid–amine complex triggers the removal of the acid, resulting in its transfer from the organic phase to the aqueous medium. , Several reports have recommended using aqueous solutions of sodium salts and alkaline agents during the stripping of carboxylic acids from organic media, and the process with these substances follows the displacement reaction (addition of salt, eq ) and the pH-shift (eq ) mechanisms, respectively. − Stripping efficiency (S(%)) can be calculated from eq . false( TOA − H + − L − false) org + C + A aq − ⇄ false( TOA − H + − A − false) org + CL aq false( TOA − H + − L − false) org + C + A aq − ⇄ TOA org + CL aq + HA normalS ( % ) = [LA] aq [LA] org , total × 100 …”

Section: Theorymentioning

confidence: 99%

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Eco-Friendly Approach for the Recovery of Lactic Acid by Complex Extraction

Erdas,

Marti

2024

ACS Omega

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To meet the growing demand for high-purity lactic acid (LA) for biocompatible and biodegradable polymers, LA recovery by green techniques has been attracting the attention. This study focuses on the evaluation of vegetable oils as organic phase diluents in complex extraction of LA with an aliphatic tertiary amine extractant, trioctylamine (TOA). Eight vegetable oils were tested, and their performances were evaluated individually and compared with those obtained using 1-octanol. Extraction yields with these oils were similar; however, efficiencies with safflower oil (SFO) were slightly higher than those obtained with other oils tested. Efficiency with SFO + TOA varied inversely with temperature and pH; however, it increased with higher LA and TOA concentrations. Within the ranges of parameters investigated, the highest yield in SFO was 66% and was achieved at the highest TOA (1.0 M) and LA (1.5 M) concentrations. The efficiency obtained in 1-octanol under the identical conditions was 76%. Thus, the yields obtained with SFO + TOA and 1-octanol + TOA were comparable under most of the conditions tested, especially at the higher LA concentrations, which is preferred for commercial production. Following that, >99% of the LA was transferred from the organic phase to the (second) aqueous phase using NaOH (1.0 M) as a stripping agent. The organic phase was tested in subsequent extractions, and yields comparable to those obtained in the first uses were achieved. This study demonstrated that vegetable oils have the potential to be used as organic phase diluents during complex extraction of LA.

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Section: Resultssupporting

confidence: 91%

Section: Effect Of Concentrationmentioning

confidence: 95%

Section: Theorymentioning

confidence: 99%

Section: Theorymentioning

confidence: 99%

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Eco-Friendly Approach for the Recovery of Lactic Acid by Complex Extraction

Erdas,

Marti

2024

ACS Omega

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“…According to earlier reports, the latter can account for up to 40− 50% of the overall cost. 13,14 Crystallization is one of the primary methods recommended by the researchers. 3,15,16 However, high cost and impurities are the main problems with this technique.…”

Section: Introductionmentioning

confidence: 99%

Efficient Recovery of Itaconic Acid Using Weak and Strong Anion Exchange Resins from Aqueous Solutions

Can,

Zeidan,

Marti

2024

Ind. Eng. Chem. Res.

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Itaconic acid (IA) has the potential to be one of the industry's most remarkable raw materials, but it must be recovered with high efficiency and selectivity from complex aqueous-based production media. In this study, three types of weak basic anion exchangers (WBAEs, Amberlite IRA-67, Lewatit MP-62, and Lewatit MP-64) and a strong basic anion exchanger (SBAE, Lewatit M-500) were tested for the separation of IA from aqueous solutions. The process was considerably affected by the operating pH, and the highest efficiencies were obtained at pH 3 and 4 with the WBAEs and SBAE, respectively. Equilibration was achieved in ∼60 min, and the data fitted the pseudo-second-order kinetic model for all resins tested. Decreasing yields with an increase in temperature confirmed the exothermic nature of the process. Isotherm curves demonstrated the consistency of the equilibrium data with Type I. The capacities increased with IA concentrations and decreased with resin doses. Lewatit MP-62 achieved the highest capacity (522.7 mg of IA/g of resin), and its performance was significantly better than those previously reported in the literature. The equilibrium data were in agreement with the Langmuir isotherm model; however, the R 2 values attained with the Freundlich and Temkin models were also relatively high, indicating the need for further isotherm analyses.

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Selective and efficient separation of levulinic, acetic and formic acids from multi-acid solutions by adjusting process parameters

Zeidan,

Marti

2023

Journal of Water Process Engineering

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Using eco-friendly alternatives for the recovery of pyruvic acid by reactive extraction

Cited by 8 publications

References 87 publications

Eco-Friendly Approach for the Recovery of Lactic Acid by Complex Extraction

Eco-Friendly Approach for the Recovery of Lactic Acid by Complex Extraction

Efficient Recovery of Itaconic Acid Using Weak and Strong Anion Exchange Resins from Aqueous Solutions

Selective and efficient separation of levulinic, acetic and formic acids from multi-acid solutions by adjusting process parameters

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