Extraction of Carboxylic Acids by ABC Extractants: Effects of Temperature, the Polarity of the Diluent, and the Ratio Between Extractant Components

Eyal, Aharon M.; Vitner, A.; Hazan, B.

doi:10.1081/sei-120027574

Cited by 9 publications

(9 citation statements)

References 10 publications

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“…The diluents selection criterion has shown that the aliphatic and aromatic diluents have different performances in the solvent extraction. − This might result from the different polarities of the diluents. Therefore, four different diluents were tested for the La(III) extraction with [A336][CA-12] and [A336][CA-100] (Table ).…”

Section: Resultsmentioning

confidence: 99%

Application of Bifunctional Ionic Liquid Extractants [A336][CA-12] and [A336][CA-100] to the Lanthanum Extraction and Separation from Rare Earths in the Chloride Medium

Wang

Yang

Cui

et al. 2011

Ind. Eng. Chem. Res.

109

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In this Article, bifunctional ionic liquid extractants (Bif-ILEs) tricaprylmethylammonium sec-octylphenoxy acetic acid ) and tricaprylmethylammonium sec-nonylphenoxy acetic acid ([A336][CA-100]) used for the rare earths (REs) extraction from the chloride medium have been investigated. The effects of extractants concentration, equilibrium pH of aqueous phase, salt concentration, temperature, etc., were discussed. The results show that the extraction ability of [A336][CA-12] and [A336][CA-100] is higher than that of the conventional extractants sec-octylphenoxy acetic acid (CA-12), sec-nonylphenoxy acetic acid (CA-100), tri-n-butyl phosphate (TBP), and di-(1-metylheptyl)methyl phosphate (P350) under the same conditions. Furthermore, in the [A336][CA-12] system, the separation factors (β) between La(III) and other REs(III) are higher than 6.0, which indicates that [A336][CA-12] would be suitable for the La(III) extraction and separation. The extraction mechanism is also proposed, and there is a similar extraction tendency in both the [A336][CA-12] and the [A336][CA-100] systems. The loaded organic phase is easy to strip; more than 95% La(III) could be stripped from the loaded organic phase when the stripping acidity is higher than 0.03 M. The recycling experiments also indicate that the two extraction systems could be recycled without loss of the extraction efficiency.

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Section: Resultsmentioning

confidence: 99%

Application of Bifunctional Ionic Liquid Extractants [A336][CA-12] and [A336][CA-100] to the Lanthanum Extraction and Separation from Rare Earths in the Chloride Medium

Wang

Yang

Cui

et al. 2011

Ind. Eng. Chem. Res.

109

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“…The importance of the temperature as a critical process parameter stems from its capacity to influence the solubility and interaction or reactivity of chemicals in a liquid medium. Both solvation and acid–amine complex formation via proton transfer exhibit exothermic behavior. , Hence, elevating the temperature results in a decrease in the extraction of organic acids in most of the systems that were examined. ,,, In this study, the effect of temperature on LA extraction by using TOA in SFO was investigated in the range of 298–338 K. The concentration of TOA ranged from 0.2 to 1.0 M, while that of LA was fixed at 0.5 M.…”

Section: Resultsmentioning

confidence: 99%

“…In SFO, a linear-like relationship between the concentrations and relatively low slopes were observed at low TOA molarities (0.2–0.6 M). The slopes became steeper at higher TOA concentrations, indicating higher extraction yields. − …”

Section: Resultsmentioning

confidence: 99%

“… , Since the addition of acid or base molecules to the aqueous solution changes the pH of the medium, the extraction of the target acid with amine extractant is also expected to be affected. Another process variable, temperature may also affect the distribution of a carboxylic acid between an organic and aqueous media due to the exothermic nature of the acid–amine complexation. , pH = normalp K A + log nobreak0em0.25em⁡ [L − false] [HL] …”

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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“…This can be associated with the charge of the tertiary amine (the functional group in both resins) which is cross-linked to the polymeric matrix (acrylic or styrene) in Amberlite ® IRA67 and Diaion ® WA30. It is assumed that the lone pair electron of the nitrogen atom in the tertiary amine is likely to hydrogen bond to lactic acid through the chloride ion [20,36]. This mechanism is also supported by works from Yousuf et al [35], Kislik [13] and Kulprathipanja and Oroskar [20], who reported that possible interactions between amine-based extractants and carboxylic acids are through hydrogen bonding, acid-base interaction, hydrophobic interaction, ion-ion pair formation or solvation.…”

Section: Selection Of Anion Exchange Resinmentioning

confidence: 99%

Purification and polymerisation of microbial d-lactic acid from DDGS hydrolysates fermentation

Zaini

Chatzifragkou

Tverezovskiy

et al. 2019

Biochemical Engineering Journal

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A multi-step process was developed for microbial D-lactic acid purification, followed by poly-D-lactic acid (PDLA) synthesis via azeotropic polycondensation process. Several anion exchange resins were screened for their binding capacity using model lactic acid solutions. Amberlite ® IRA67 (weak base anion exchange resin) showed the highest lactic acid adsorption, with maximum adsorption capacity, qmax, of 136.11 mg lactic acid / g of resin, and was further selected to purify D-lactic acid from DDGS hydrolysates through a three-step process; (1) treatment with 7% w/v activated carbon, (2) acidification of fermentation broth (Amberlite ® IRA120) and (3) adsorption of lactic acid by anion exchange (Amberlite ® IRA67). At the end of the purification process, 80.4% (w/w) D-lactic acid was recovered with 91.8% (w/w) purity, indicating the effectiveness of the developed downstream process. Furthermore, a clear yellowish solid polymer with a molecular weight of 3010 Da was obtained, suitable for applications in biomedical and agricultural sectors.

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Extraction of Carboxylic Acids by ABC Extractants: Effects of Temperature, the Polarity of the Diluent, and the Ratio Between Extractant Components

Cited by 9 publications

References 10 publications

Application of Bifunctional Ionic Liquid Extractants [A336][CA-12] and [A336][CA-100] to the Lanthanum Extraction and Separation from Rare Earths in the Chloride Medium

Application of Bifunctional Ionic Liquid Extractants [A336][CA-12] and [A336][CA-100] to the Lanthanum Extraction and Separation from Rare Earths in the Chloride Medium

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

Purification and polymerisation of microbial d-lactic acid from DDGS hydrolysates fermentation

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