Extractant screening for the separation of dichloroacetic acid from monochloroacetic acid by extractive distillation

Jongmans, Mark; Londoño, Amparo; Mamilla, S.B.; Pragt, Hans; Aaldering, K.T.J.; Bargeman, Gerrald; Nieuwhof, M.R.; Kate, Antoon ten; Verwer, P.; Kiss, Anton A.; Strien, C. J. G. van; Schuur, Boelo; Haan, A.B. de

doi:10.1016/j.seppur.2012.06.040

Cited by 22 publications

(34 citation statements)

References 42 publications

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“…In industrial processes for MCA production, the concentration of undesired DCA by-product is usually reduced by reconverting it into MCA by a hydrogenation process, such that a DCA impurity level of~300-1000 ppm is obtained [18]. However, the hydrogenator also converts some of the MCA back into acetic acid, thus requiring an additional step to separate the acetic acid from MCA.…”

Section: Problem Statementmentioning

confidence: 99%

“…Thus, there is a clear incentive for an alternative method to effectively separate DCA from MCA. To solve this important industrial problem, this study proposes a novel ED process for the separation of MCA-DCA (highly acidic and corrosive mixture), using DGDP as one of the most suitable experimentally proven solvents [18]. A sin-gle-step separation should be feasible by using either a DWC or a column with a side-rectifier.…”

Section: Problem Statementmentioning

confidence: 99%

“…In case of the MCA‐DCA separation, complexation agents, such as ethers, ketones, and phosphine oxides (along with the benchmark extractant, sulfolane), are the only extractants that proved to be thermally and chemically stable in a strongly acidic environment (Tab. 1) 17. Jongmans et al 18 concluded that glymes, e.g., diethylene glycol dipentyl ether (DGDP), are actually the most promising extractants when considering their relative volatility, regeneration ability, and stability.…”

Section: Introductionmentioning

confidence: 99%

“…1) 17. Jongmans et al 18 concluded that glymes, e.g., diethylene glycol dipentyl ether (DGDP), are actually the most promising extractants when considering their relative volatility, regeneration ability, and stability. Using glymes as extractants can significantly increase the relative volatility of MCA‐DCA up to 2.1–2.4 at a DCA/extractant molar ratio of 1.…”

Section: Introductionmentioning

confidence: 99%

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Eco‐efficient Separation of Mono‐ and Dichloroacetic Acid by Thermally Coupled Extractive Distillation

et al. 2020

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Due to its high reactivity, monochloroacetic acid (MCA) is an essential intermediate used in the manufacturing of a wide variety of chemicals. Its industrial production process is highly energy-and capital-intensive, requiring costly purification steps to remove dichloroacetic acid (DCA) impurities. Here, an innovative eco-efficient process for MCA-DCA separation is proposed based on extractive distillation in a fully thermally coupled system (a dividing-wall column (DWC) or an equivalent side-rectifier configuration) using a new effective solvent: diethylene glycol dipentylether. The design was optimized by performing sensitivity analyses and varying key operating and design parameters. The study proves that separating MCA-DCA by an extractive DWC (or thermally coupled) is feasible, efficient, controllable, economic, and sustainable.

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Section: Problem Statementmentioning

confidence: 99%

Section: Problem Statementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Eco‐efficient Separation of Mono‐ and Dichloroacetic Acid by Thermally Coupled Extractive Distillation

et al. 2020

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“…14,15 However, for the successful industrial application of these chemicals, the toxicity, corrosion behavior, and physical properties of the ILs should be sufficiently known. They are formed by an organic cation and an (in)organic anion.…”

Section: Novel Solventsmentioning

confidence: 99%

Advances in Extractive Distillation

Kiss¹

2019

Reference Module in Chemistry, Molecular Sciences and Chemical Engineering

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Vapor–liquid behavior of phenol and cumene in ternary and quaternary mixtures

Sprakel

Bargeman

Sanchez

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND: Although phenol is a key intermediate in the plastics and polycarbonate industry, it is also a toxic component that requires removal from dilute aqueous streams, potentially by liquid-liquid extraction (LLX). For LLX, cumene is suggested as a solvent as it is already present in processes in the polycarbonate industry. For the recovery of cumene from phenol by distillation, knowledge on vapor-liquid equilibrium (VLE) behavior is important, in combination with how this is affected by other components possibly present as an impurity or explicitly added as a solvent. This was investigated in this work. RESULTS:The binary cumene-phenol system shows a tangent pinch in the binary VLE diagram. Addition of a range of impurities and solvents showed that hydrogen bond accepting compounds strongly improve the relative volatility of the mixture, whereas dodecane, not capable of forming hydrogen bonds, has a negative effect on the relative volatility. CONCLUSION: Addition of polar components with hydrogen bonding abilities, i.e. ketones or ethers, affected the relative volatility of cumene over phenol the most positively. Combining two types of components results in similar effects, and clear synergistic effects could not be shown based on current VLE measurements. Addition of an apolar component in combination with polar components with hydrogen abilities had only a minor effect on the relative volatility.

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Extractant screening for the separation of dichloroacetic acid from monochloroacetic acid by extractive distillation

Cited by 22 publications

References 42 publications

Eco‐efficient Separation of Mono‐ and Dichloroacetic Acid by Thermally Coupled Extractive Distillation

Eco‐efficient Separation of Mono‐ and Dichloroacetic Acid by Thermally Coupled Extractive Distillation

Advances in Extractive Distillation

Vapor–liquid behavior of phenol and cumene in ternary and quaternary mixtures

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