Application of the partially thermally coupled distillation flowsheets for the extractive distillation of ternary azeotropic mixtures

Тимошенко, А. В.; Анохина, Е. А.; Morgunov, A. V.; Rudakov, D. G.

doi:10.1016/j.cherd.2015.07.007

Cited by 62 publications

(33 citation statements)

References 52 publications

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“…In recent years, ED has been extended to the separation of ternary azeotropic mixtures. Timoshenko et al . introduced many ED flowsheets to separate ternary mixtures with azeotropes and evaluated the applicability of the ED flowsheets with the partially thermally coupled distillation columns for all types of vapor–liquid equilibrium diagram.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optimization of the composition of mixed entrainer for economic extractive distillation process in view of the separation of tetrahydrofuran/ethanol/water ternary azeotrope

Zhao

Jia

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND: There are three binary azeotropes in the tetrahydrofuran/ethanol/water ternary system at atmospheric pressure. Ternary extractive distillation (ED) processes were studied to separate the ternary azeotropic mixture using two single component solvents and a mixed solvent as entrainer.RESULT: Based on the sequential iterative optimization procedure, the minimal total annual costs (TACs) of the ternary extractive distillation process using ethylene glycol (EG), dimethyl sulfoxide (DMSO), and the mixture of DMSO and EG as entrainer were obtained. Compared with two single component entrainers DMSO and EG, the TAC of the extractive distillation process with mixed entrainer (60 mol% DMSO + 40 mol% EG) decreases by 6.55% and 31.88%, respectively. Furthermore, the reboiler heat duties of two extractive distillation columns (EDCs) with mixed entrainer were compared with two single component entrainers. CONCLUSION:The results show that the optimal ED process using mixed entrainer performs better than that using single component entrainers from the perspective of economics. Moreover, there is a tradeoff between the reboiler heat duties of two EDCs, which can be adjusted by changing the entrainer performance in two EDCs. The use of mixed entrainer enhances the flexibility of the tradeoff because it only needs to change the composition of the mixed entrainer.

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Section: Introductionmentioning

confidence: 99%

“…Three binary azeotropes exist in THF/ethanol/water ternary system at atmospheric pressure. Timoshenko et al . pointed out that the entrainer should be applied twice, if the initial ternary mixture contains more than one azeotrope.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the composition of mixed entrainer for economic extractive distillation process in view of the separation of tetrahydrofuran/ethanol/water ternary azeotrope

Zhao

Jia

et al. 2017

J of Chemical Tech & Biotech

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“…The initial conventional scheme which is the base for the generation of new configurations was called pre‐image, and the synthesized other schemes were called images. Note, that the algorithm can also be applied to the synthesis of partially thermally coupled extractive distillation schemes for multicomponent azeotropic mixture separation 42–45.…”

Section: Catalytic Cracking Gas Separationsmentioning

confidence: 99%

Energy‐Saving Hydrocarbon Distillation with Coupled Heat and Material Flows

Тимошенко¹,

Анохина²,

Akhapkina³

2016

Chem Eng & Technol

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High energy consumption during distillation is a problem in petrochemical and refining industry. Therefore, the distillation of hydrocarbons was investigated with the aim to reduce the energy consumption by applying columns with fully or partially thermally coupled heat and material flows. The elements of downstream processes were considered, such as the separation of catalytic cracking gas and the recovery of benzene from petroleum and coking coal products by extractive distillation with N-methylpyrrolidone. It was found that the thermally coupled columns applied for the separation reduced the energy consumption for catalytic cracking gas separation by up to 13.1 % and for benzene recovery by up to 28.7 %.

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“…Currently, special distillations such as extractive distillation (ED), heterogeneous azeotropic distillation (HAD), pressure‐swing distillation (PSD) and reactive distillation (RD) are adopted to separate such azeotropes. Arifin et al .…”

Section: Introductionmentioning

confidence: 99%

Thermal coupled extractive distillation sequences with three entrainers for the separation of azeotrope isopropyl alcohol + diisopropyl ether

Zhang

Gao

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND During the synthesis of isopropyl alcohol (IPA) by hydration of propylene, diisopropyl ether (DIPE) is usually produced as a by‐product. Because IPA and DIPE can form a binary homogeneous azeotrope with the minimum boiling temperature at atmospheric pressure, it is difficult to separate the binary mixture by simple distillation. RESULT For separating the azeotrope IPA + DIPE, side‐stream extractive distillation column (SSED) and extractive dividing wall column (EDWC) processes with three entrainers [2‐methoxyethanol (2‐MEA), 2‐ethoxyethanol and propylene glycol ethyl ether (PGEE)] were simulated and optimized based on the minimal total annual cost (TAC). Moreover, CO2 emissions of the six sequences were calculated and the impact on the environment evaluated. CONCLUSIONS The sequence of SSED with PGEE as entrainer can reduce TAC by ≤34.48%, but EDWC with PGEE can offer TAC reduction of ≤52.46%. The results demonstrate that the EDWC sequence with PGEE as entrainer is favourable for separating the binary azeotrope IPA + DIPE. © 2020 Society of Chemical Industry

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Application of the partially thermally coupled distillation flowsheets for the extractive distillation of ternary azeotropic mixtures

Cited by 62 publications

References 52 publications

Optimization of the composition of mixed entrainer for economic extractive distillation process in view of the separation of tetrahydrofuran/ethanol/water ternary azeotrope

Optimization of the composition of mixed entrainer for economic extractive distillation process in view of the separation of tetrahydrofuran/ethanol/water ternary azeotrope

Energy‐Saving Hydrocarbon Distillation with Coupled Heat and Material Flows

Thermal coupled extractive distillation sequences with three entrainers for the separation of azeotrope isopropyl alcohol + diisopropyl ether

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