Reactive Extraction of Cyclic Polyhydroxy Carboxylic Acid Using Trioctylamine (TOA) in Different Diluents

Tuyun, Amaç Fatih; Uslu, Hasan

doi:10.1021/je201311n

Cited by 16 publications

(9 citation statements)

References 33 publications

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“…However, in this study it can be clearly seen that the loading factors with all diluents decrease with the rise in DOA or TOPO concentration, and they become lower than unity in higher concentrations; so, overloading has not occurred. The same results ( Z > 1, low concentrations) are also revealed in different studies in the literature. , …”

Section: Resultssupporting

confidence: 86%

Comparison of Extractability of Oxalic Acid from Dilute Aqueous Solutions Using Dioctylamine and Trioctylphosphine Oxide

2019

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In this investigation, the reactive extraction of oxalic acid from its dilute solutions using trioctylphosphine oxide (TOPO) or dioctylamine (DOA) mixed with several solvents was studied to examine the most proper extractant mixture. The organic-phase combinations were prepared by merging either TOPO or DOA with n-octane, 1-butanol, 1-decanol, methyl isobutyl ketone (MIBK), diisobutyl ketone (DIBK), and diethyl sebacate (DES), respectively. The distribution coefficient, loading factor, and the extraction yield data were calculated for the interpretation of the results. It is found that in comparison with the physical extraction experiments performed with pure solvents oxalic acid extraction from aqueous solutions can be improved significantly by introducing TOPO or DOA to the extractant composition. According to the results, the maximum oxalic acid extraction is obtained with an extraction efficiency of 98.74% and a distribution coefficient of 78.125 if 1.652 mol•kg −1 of DOA dissolved in MIBK is used as the extractant mixture. It can be inferred that using DOA instead of TOPO gives better results for the oxalic acid extraction; however, an aggregate formation was observed with this extractant leading to the problems in the back extraction step of oxalic acid.

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Section: Resultssupporting

confidence: 86%

Comparison of Extractability of Oxalic Acid from Dilute Aqueous Solutions Using Dioctylamine and Trioctylphosphine Oxide

2019

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“…The similar kind of behavior of toluene and xylene may be attributed to their close properties. Table shows the comparative study of reactive extraction of other carboxylic acids with tri- n -caprylyl amine in various diluents. − Therefore, it was found that benzeneacetic acid has the highest distribution coefficient and extraction efficiency.…”

Section: Resultsmentioning

confidence: 99%

Reactive Separation of Benzeneacetic Acid with Tri-n-caprylyl Amine: Equilibrium and Modeling

et al. 2016

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Benzeneacetic acid is an important carboxylic acid extensively used in pharmaceutical industries. Thus, interest has been growing in the scientific community toward its recovery from aqueous streams or fermentation broth. Extraction of carboxylic acids by reactive extraction using extractant-diluent is the emerging area of study. With this concept, the reactive extraction of benzeneacetic acid was carried out to study (i) effect of diluents, such as benzene, toluene, xylene, and hexanol; (ii) effect of concentration of extractant, tri-n-caprylyl amine; (iii) effect of pH; and (iv) equilibrium modeling, namely, relative basicity model and mass action law. The equilibrium results are discussed in terms of partition coefficient (P), dimerization constant (D), distribution coefficient (K D ), extraction efficiency (η%), overall equilibrium complexation constant (K e ), and loading factor (ϕ). Distribution coefficient trend was observed as xylene > benzene > toluene > hexanol. The extraction efficiency of benzeneacetic acid was found to be 99.2% when 0.46 mol·kg −1 tri-n-caprylyl amine was employed in xylene. Moreover, equilibrium results were fitted with relative basicity and mass action law model and it was found that relative basicity model predicted the results better than mass action law for reactive extraction of benzeneacetic acid. The study will be useful in the design of reactive extraction process for the recovery of benzeneacetic acid.

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“…MEK is a polar solvent and has a reactive functional group that upgrades the extraction capacity of the shaped acid–amine complex. The outcomes reveal that the increase in the starting amount of TPA in the organic media essentially improves the extraction yield of the process. , …”

Section: Results and Discussionmentioning

confidence: 96%

Study on Oxalic Acid Extraction by Tripropylamine: Equilibrium and Computational COSMO-SAC Analysis

et al. 2020

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Oxalic acid was extracted from aqueous solution using tripropylamine (TPA) in different organic solvents. Ten organic solvents such as 1-butanol, isoamyl alcohol, methyl ethyl ketone (MEK), methyl isobutyl ketone, diisobutyl ketone (DIBK), isobutanol, n-hexane, dimethyl glutarate, ethyl propionate, and diethyl carbonate (DEC) were used to prepare an organic phase with TPA. From the experimental data, some thermodynamic coefficients were calculated such as the distribution coefficient (K D ), loading factor (Z), and the extraction yield (E %). It is discovered upon examination that the physical extraction analyses performed with pure solvents for oxalic acid extraction from aqueous media can be improved essentially by adding TPA. As per the results obtained, the most effective oxalic acid extraction is achieved with an extraction productivity (efficiency) of 99.86% and a K D of 716.948 if 2.608 mol kg −1 of TPA diluted in MEK is utilized as the extractant mixture. The COSMO-SAC model has been used to analyze the experimental data for the first time. This model provides insight into the interactions between substances with good results.

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Reactive Extraction of Cyclic Polyhydroxy Carboxylic Acid Using Trioctylamine (TOA) in Different Diluents

Cited by 16 publications

References 33 publications

Comparison of Extractability of Oxalic Acid from Dilute Aqueous Solutions Using Dioctylamine and Trioctylphosphine Oxide

Comparison of Extractability of Oxalic Acid from Dilute Aqueous Solutions Using Dioctylamine and Trioctylphosphine Oxide

Reactive Separation of Benzeneacetic Acid with Tri-n-caprylyl Amine: Equilibrium and Modeling

Study on Oxalic Acid Extraction by Tripropylamine: Equilibrium and Computational COSMO-SAC Analysis

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