Enhanced separation of maximum boiling azeotropic mixtures with extractive heterogeneous-azeotropic distillation

Toth, András Jozsef; Szilágyi, Botond; Haáz, Enikő; Solti, Szabolcs; Nagy, Tibor; Szanyi, Agnes; Nagy, Judit; Mizsey, Péter

doi:10.1016/j.cherd.2019.05.002

Cited by 14 publications

(4 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Separation of non-ideal azeotrope-containing mixtures is often complex and serious challenge. Therefore, there is need for hybrid process that can efficiently and economically separate azeotropic mixtures, such as pressure change, extractive, homogeneous azeotropic and heterogeneous azeotropic distillation [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ], hybrid distillation-pervaporation process [ 10 , 11 , 12 , 13 , 14 , 15 ] extractive heterogeneous azeotropic distillation (EHAD) [ 16 , 17 , 18 ] and hydrophilic or organophilic pervaporation (HPV, OPV) [ 19 , 20 , 21 , 22 , 23 , 24 ]. It can be mentioned that volatile organic compounds (VOCs) [ 25 , 26 ] can be separated from wastewater by pervaporation membranes and distillation processes, e.g., ethyl acetate-ethanol [ 27 , 28 ], acetone-butanol-ethanol [ 29 ], isobutanol [ 30 , 31 ], isopropanol [ 32 , 33 , 34 , 35 ], tetrahydrofuran (THF) [ 36 ], ethanol [ 37 , 38 , 39 ], methanol [ 35 , 40 ].…”

Section: Introductionmentioning

confidence: 99%

Separation of Alcohol-Water Mixtures by a Combination of Distillation, Hydrophilic and Organophilic Pervaporation Processes

2020

Self Cite

View full text Add to dashboard Cite

It can be stated that in the fine chemical industries, especially in the pharmaceutical industry, large amounts of liquid waste and industrial waste solvents are generated during the production technology. Addressing these is a key issue because their disposal often accounts for the largest proportion of the cost of the entire technology. There is need to develop regeneration processes that are financially beneficial to the plant and, if possible, reuse the liquid waste in the spirit of a circular economy, in a particular technology, or possibly elsewhere. The distillation technique proves to be a good solution in many cases, but in the case of mixtures with high water content and few volatile components, this process is often not cost-effective due to its high steam consumption, and in the case of azeotropic mixtures there are separation constraints. In the present work, the membrane process considered as an alternative; pervaporation is demonstrated through the treatment of low alcohol (methanol and ethanol) aqueous mixtures. Alcohol-containing process wastewaters were investigated in professional process simulator environment with user-added pervaporation modules. Eight different methods were built up in ChemCAD flowsheet simulator: organophilic pervaporation (OPV), hydrophilic pervaporation (HPV), hydrophilic pervaporation with recirculation (R-HPV), dynamic organophilic pervaporation (Dyn-OPV), dynamic hydronophilic pervaporation (Dyn-HPV), hybrid distillation-organophilic pervaporation (D + OPV), hybrid distillation-hydrophilic pervaporation (D + HPV), and finally hybrid distillation-hydrophilic pervaporation with recirculation (R-D + HPV). It can be stated the last solution in line was the most suitable in the terms of composition, however distillation of mixture with high water content has significant heat consumption. Furthermore, the pervaporation supplemented with dynamic tanks is not favourable due to the high recirculation rate in the case of tested mixtures and compositions.

show abstract

Section: Introductionmentioning

confidence: 99%

Separation of Alcohol-Water Mixtures by a Combination of Distillation, Hydrophilic and Organophilic Pervaporation Processes

2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…On the other hand, different distillation schemes have been proposed in order to overcome the azeotropic conditions. Extractive distillation (ED), azeotropic distillation (AD), pressure-swing distillation (PSD), and reactive distillation (RD) are commonly used to separate nonideal mixtures across a distillation boundary. − Almost all of these latter distillation schemes involve the use of an additional component (entrainer, solvent and reactant) to modify the liquid–vapor equilibrium behavior, as compared to conventional distillation. However, the separation is still strictly governed by a thermodynamic equilibrium (phase and chemical equilibrium).…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Evaluation of a Distillation–Pervaporation in a Single Unit Column for the Separation of an Azeotropic Mixture

León

Fontalvo

2020

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

A distillation–pervaporation in a single unit (DPSU) column previously was theoretically studied based on mixture thermodynamics. It was observed that the separation inside the DPSU column is not restricted by the thermodynamics of nonideal mixtures as conventional distillation columns, or externally connected distillation–pervaporation (ECDP) columns. In this work, theoretical and experimental evaluations of a DPSU column at infinite reflux ratio was performed for the azeotropic mixture of ethanol–isopropanol–water. Silica membranes were used to recover internally water from the DPSU column. Two DPSU column configurations were proposed: (1) the membrane section located on the top of the column and (1b) an intermediate membrane section. The results showed the distillation boundary was internally overcome by both DPSU column configurations, since the water removal by pervaporation modified the volatility of the components, as compared to a conventional distillation. No thermodynamic restrictions were observed close to the distillation boundaries. In addition, theoretical results from the simplified model derived in previous works were compared to the experimental data. Good agreement between theoretical and experimental results was observed in this work.

show abstract

“…During pharmaceutical and chemical production, many azeotropes are often formed; these mixtures cannot be effectively separated by using conventional distillation methods. Therefore, ED is frequently employed in chemical separation to separate azeotropic systems or mixtures with relative volatility close to 1. , To cater to the advancements in various fields and generate substantial economic value, ED has seen significant development over the past few decades, with the technology consistently achieving progressive breakthroughs and continuously improving towards sustainability.…”

Section: Extractive Distillation Process Designmentioning

confidence: 99%

Design and Multiple Performance Evaluation of Green Sustainable Process for Azeotropes Separation via Extractive Distillation

Zhong,

Cheng,

Dai

et al. 2023

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Multicomponent liquid mixtures, particularly azeotropes, are extensively utilized in the chemical, petroleum, pharmaceutical, and other processing industries. Energy-saving and efficient separation of azeotropes holds significant value for the design and development of sustainable industrial processes. Extractive distillation (ED) has consistently played a pivotal role in azeotrope separation. We offer a broad and comprehensive review that encompasses recent progress in multiple aspects of ED, including the screening of entrainers, process design, enhancement schemes, dynamic control strategies, and environmental assessment. Initially, we delved into the application of quantum chemistry calculations and molecular dynamics simulation for screening suitable entrainers. We then elucidate the design principles and forms of two distinct types of ED processes. Subsequently, we explore the intensification mechanisms of the ED process through coupling mechanisms, such as heat integration and the combination of ED with other distillation processes. We also summarize the recent improvements in dynamic control strategies for various ED processes. Lastly, we evaluate various aspects of ED from the perspectives of environmental impact, economic viability, and exergy analysis. This study investigates the challenges, prospects, and emerging trends of ED technology for the separation of multicomponent azeotropes.

show abstract

Enhanced separation of maximum boiling azeotropic mixtures with extractive heterogeneous-azeotropic distillation

Cited by 14 publications

References 20 publications

Separation of Alcohol-Water Mixtures by a Combination of Distillation, Hydrophilic and Organophilic Pervaporation Processes

Separation of Alcohol-Water Mixtures by a Combination of Distillation, Hydrophilic and Organophilic Pervaporation Processes

Theoretical and Experimental Evaluation of a Distillation–Pervaporation in a Single Unit Column for the Separation of an Azeotropic Mixture

Design and Multiple Performance Evaluation of Green Sustainable Process for Azeotropes Separation via Extractive Distillation

Contact Info

Product

Resources

About