Distillation-pervaporation membrane hybrid system for epichlorohydrin and isopropyl alcohol recovery in epoxy resin production process

Kim, Hyeon-Gook; Na, Hye-Ryun; Lee, Hye Ryeon; Kim, Moon Il; Lim, Choong‐Sun; Seo, Bongkuk

doi:10.1016/j.seppur.2020.117678

Cited by 11 publications

(3 citation statements)

References 24 publications

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“…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

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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.

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Section: Introductionmentioning

confidence: 99%

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

2020

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“…The sufficient activation of macroporous resin is an indispensable step to ensure an excellent separation efficiency. 43,44 Generally, an insufficient activation is caused by incorrect operations and the improper usage of activating reagents. In this study, macroporous resin without sufficient activation was used for the separation in the 17th batch.…”

Section: Resultsmentioning

confidence: 99%

Real-time monitoring of the column chromatographic process of Phellodendri Chinensis Cortex part II: multivariate statistical process control based on near-infrared spectroscopy

Cui

Zhang

et al. 2022

New J. Chem.

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“…Epichlorohydrin (ECH) is a hazardous substance that contains chlorinated epoxy moiety [ 1 , 2 ], and isopropanol (IPA) is commonly used as a solvent in the epoxy resin manufacturing process. The water produced during synthesis forms an azeotropic ternary mixture with ECH and IPA [ 3 , 4 ]. Therefore, recycling (mainly dehydrating) this hazardous mixture is crucial for increasing product competitiveness in an environmentally friendly manner.…”

Section: Introductionmentioning

confidence: 99%

Augmenting the Efficacy of a Polyvinyl Alcohol Selective Layer Coated on Polyvinylidene Fluoride Support Membranes with Kaolinite Introduction for Improved Pervaporation Dehydration of Epichlorohydrin/Isopropanol/Water Ternary Systems

Chaudhari,

Jeong,

Shin

et al. 2024

Polymers

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Composite membranes with a polyvinyl alcohol (PVA) selective layer composed of well-dispersed hydrophilic kaolinite particles coated on a polyvinylidene fluoride (PVDF) support were developed. They were applied to the pervaporation dehydration of the industrially important epichlorohydrin (ECH)/isopropanol (IPA)/water ternary mixture. In comparison with raw kaolinite (RK), hydrophilic kaolinite (HK) enhanced the mechanical properties, hydrophilicity, and thermal stability of the PVA selective layer, as confirmed by universal testing, the contact angle, and TGA analyses, respectively. The pervaporation results revealed that the addition of HK particles significantly enhanced the separation factor (3-fold). Only a marginal reduction in flux was observed with ECH/IPA/water, 50/30/20 (w/w %) at 40 °C. An HK particle concentration of 4 wt.% with respect to PVA delivered the highest flux performance of 0.86 kg/m2h and achieved a separation factor of 116. The PVA–kaolinite composite membrane exhibited pronounced resistance to the ECH-containing feed, demonstrating a sustained flux and separation factor throughout an extended pervaporation stability test lasting 250 h.

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Distillation-pervaporation membrane hybrid system for epichlorohydrin and isopropyl alcohol recovery in epoxy resin production process

Cited by 11 publications

References 24 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

Real-time monitoring of the column chromatographic process of Phellodendri Chinensis Cortex part II: multivariate statistical process control based on near-infrared spectroscopy

Augmenting the Efficacy of a Polyvinyl Alcohol Selective Layer Coated on Polyvinylidene Fluoride Support Membranes with Kaolinite Introduction for Improved Pervaporation Dehydration of Epichlorohydrin/Isopropanol/Water Ternary Systems

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