Enhanced separation of highly non-ideal mixtures with extractive heterogeneous-azeotropic distillation

Tóth, András; Szanyi, Agnes; Koczka, Katalin; Mizsey, Péter

doi:10.1080/01496395.2015.1107099

Cited by 14 publications

(13 citation statements)

References 15 publications

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“…EGB HS 600 Headspace apparatus was applied for sample preparation. The water concentration was measured with Hanna HI 904 coulometric Karl Fischer titrator [47][48][49]. Table 5 shows the simulated and measured results of first distillation column (Column I).…”

Section: Methodsmentioning

confidence: 99%

Modelling of Hybrid Method for VOC Removal from Process Wastewater: Distillation and Hydrophilic Pervaporation

Szilágyi

Trang

Fózer

et al. 2020

Period. Polytech. Chem. Eng.

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The study is motivated by the industrial problem from pharmaceutical industry, which is ethanol and methanol removal from process wastewater. To complete this goal hybrid method is investigated and optimized. Two distillation columns are sufficient for separation of alcohol-water mixture. Suitable water can be purified as bottom product of first column. Ethanol and methanol purification is achieved with combination of second distillation column and pervaporation. The target of this research is to rigorously model and optimize the separation of water-ethanol-methanol ternary mixture in professional flowsheet simulator environment. The minimal sufficient membrane transfers area and number of minimal theoretical stages of the columns are determined. Cost estimation is also investigated according to Douglas methodology. Considering the simulation and economic results it can be determined that, the hybrid configuration is suitable for separation of ternary mixture in 99.5 weight percent purity.

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Section: Methodsmentioning

confidence: 99%

Modelling of Hybrid Method for VOC Removal from Process Wastewater: Distillation and Hydrophilic Pervaporation

Szilágyi

Trang

Fózer

et al. 2020

Period. Polytech. Chem. Eng.

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“…UNIQUAC method [26][27][28][29] was used for calculation of highly non-ideal vapour-liquid equilibria. The optimal mass flow rates, reflux ratio, heating and cooling requirements can also be determined [30]. Rectifying (upper) section is required for enrichment of AOX and other VOC-COD in PWW.…”

Section: Figure 4 Dichloromethane-water Vle Diagram At 1 Barmentioning

confidence: 99%

Novel method for the removal of organic halogens from process wastewaters enabling water reuse

Toth¹,

Haáz²,

Nagy³

et al. 2018

Desalination and Water Treatment

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The industrial production unavoidably generates waste in many cases but that should be recycled and reused following the principle of circular economy. New waste treatment methods or green technologies with zero waste should be developed in order to solve this problem. Since zero emission technology is a difficult task, it is rather typical that waste treatment process is developed.A typical example can be found in pharmaceutical industries because these plants generate wastewaters with high organic content, so-called process wastewaters. These waters should be definitely treated before discharging, their organic content must be removed and then the process wastewater may be usually allowed into the sewer. Nowadays, the physicochemical methods are increasingly used since they have a smaller footprint compared to that of the biological treatments.On the other hand, the polluting organic substances can be recovered and recycled or reused. In our novel method distillation is applied that is based on relative volatility differences of the individual components. The more volatile organic pollutants of the treated process wastewaters are obtained as the top product of the distillation, preferably in reusable form. The bottom product of distillation, namely the process wastewater should satisfy the discharge limits. Our novel innovative method is developed to remove and reuse the organically bound halogens (AOX) and to reduce the chemical oxygen demand (COD) below the emission limit of process wastewaters. Our method is implemented and this well-planned industrial apparatus meets the requirement of the Sustainable Water Solutions and Circular Economy, and moreover the payback time of the investment is less than two years.

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“…If such non-ideal mixtures are to be separated where both heterogeneous and homogeneous azeotropes are also present, a new hybrid tool devoted to the separation of such quaternary mixtures, the so-called extractive heterogeneous-azeotropic distillation (EHAD) can be used (Toth et al, 2017;Toth et al, 2016a;Toth et al, 2016b). This new hybrid separation tool combines the advantages of the extractive and the heterogeneous azeotropic distillations (Szanyi et al, 2004a;Toth et al, 2016a). The extractive agent or entrainer, which is water, is removed in the bottom product together with those components of the original mixture that it extracts (Skiborowski et al, 2013(Skiborowski et al, , 2014.…”

Section: Introductionmentioning

confidence: 99%

“…In the recent years the extractive heterogeneous-azeotropic distillation (EHAD) method gave great results in this field of separation (Szanyi, 2005). It combined two of the best separation methods for non-ideal mixtures, extraction and distillation (Toth et al, 2016a). Also combined in a way that it remained a continuous technology (Luyben, 2015;Toth et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Also combined in a way that it remained a continuous technology (Luyben, 2015;Toth et al, 2017). Although there are fewer in numbers in some parts of the industry, but it can be used efficiently (Toth et al, 2016a). In the case of minimum boiling azeotropes EHAD has been already examined in more research works (Toth et al, 2017;Toth et al, 2016a;Toth et al, 2016b).…”

Section: Introductionmentioning

confidence: 99%

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

Toth

Szilágyi

Haáz

et al. 2019

Chemical Engineering Research and Design

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Enhanced separation of highly non-ideal mixtures with extractive heterogeneous-azeotropic distillation

Cited by 14 publications

References 15 publications

Modelling of Hybrid Method for VOC Removal from Process Wastewater: Distillation and Hydrophilic Pervaporation

Modelling of Hybrid Method for VOC Removal from Process Wastewater: Distillation and Hydrophilic Pervaporation

Novel method for the removal of organic halogens from process wastewaters enabling water reuse

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

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