Separation of ternary mixtures by extractive distillation with 1,2-ethandiol and glycerol

Раева, В. М.; Sazonova, Aleksandra Yu.

doi:10.1016/j.cherd.2015.04.032

Cited by 42 publications

(20 citation statements)

References 12 publications

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“…The selectivity of various solvents was compared for the solvent selection in this study using the VLE data computed by molecular simulation. The selectivity was calculated by the following equation , :

true S = \frac{α_{ij}^{S}}{α_{ij}}

…”

Section: Solvent Selectionmentioning

confidence: 99%

Molecular Simulation‐Assisted Solvent Selection for Separation of 1,2,4‐Trimethylbenzene

Cho

Kim

2018

Chem Eng & Technol

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Extractive distillation is an alternative for processes where normal distillation is difficult, such as separation of close‐boiling mixtures, but solvent selection for distillation is laborious, and its selection pool is narrow. An innovative selection process using molecular simulation is proposed, and the performance of the selected solvent, 1,2,4‐trichlorobenzene, for the separation of 1,2,4‐trimethylbenzene from a C9 mixture is reviewed. The proposed process requires less investment and leads to lower operating expenses than the conventional two‐column process. The computed vapor‐liquid equilibrium determined from the molecular simulation is close to the HYSYS estimation in two ternary systems.

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true S = \frac{α_{ij}^{S}}{α_{ij}}

…”

Section: Solvent Selectionmentioning

confidence: 99%

Molecular Simulation‐Assisted Solvent Selection for Separation of 1,2,4‐Trimethylbenzene

Cho

Kim

2018

Chem Eng & Technol

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“…Rodriguez-Donis et al [10] used butyl acetate as extractant to separate acetonitrile and water mixture and analyzed the feasibility of seven configurations. Raeva et al [11] proposed that the selection of extractants should not be limited to the relative volatility, but selective analysis is also an effective method. Sazonova et al [12] found that when ED was used to separate acetonitrile and water mixture, the energy consumption of glycerol as an extractant was lower than that of dimethylsulfoxide and 1,2-ethandiol.…”

Section: Introductionmentioning

confidence: 99%

Process Simulation of the Separation of Aqueous Acetonitrile Solution by Pressure Swing Distillation

Wang

Lian

et al. 2019

Processes

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The separation of aqueous acetonitrile solution by pressure swing distillation (PSD) was simulated and optimized through Aspen Plus software. The distillation sequence of the low pressure column (LPC) and high pressure column (HPC) was determined with a phase diagram. The pressures of the two columns were set to 1 and 4 atm, respectively. Total annual cost (TAC) was considered as the objective function, and design variables, such as the tray number, the reflux ratio, and the feeding position, were optimized. The optimum process parameters were obtained. For the reduction of energy consumption, the PSD with full-heat integration was designed. The TAC of this method is lower by 32.39% of that of the PSD without heat integration. Therefore, it is more economical to separate acetonitrile and water mixture by PSD with full-heat integration, which provides technical support for the separation design of such azeotropes.

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“…В представляемой работе формирование множества потенциальных селективных агентов для ЭР систем с несколькими азеотропами проведено с учетом величин избыточной молярной энергии Гиббса бинарных составляющих «компонент -тестируемый РА» производных четырехкомпонентных систем [30].…”

Section: Introductionunclassified

“…Качественное изменение характера межмолекулярных взаимодействий (ММВ) (тип отклонения от идеального поведения) и интенсивность ММВ после введения в систему РА суммарно учитываются избыточной энергией Гиббса. Для каждой бинарной составляющей производной системы предложено [30,31]…”

Section: Introductionunclassified

“…Выполнение термодинамического критерия для тестируемого агента 2обеспечивает достаточный для разделения экстрактивный эффект. Здесь Δg Е i-PA , Δg Е j-PA -максимальные значения избыточной энергии Гиббса для бинарной азеотропной составляющей i-j в условиях ректификационного разделения [30,31].…”

Section: Introductionunclassified

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Selection of Extractive Agents for the Separation of Chloroform - Methanol - Tetrahydrofuran Mixture

Раева

Sukhov

2018

Fine Chem. Tech.

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Variants of the extractive distillation of chloroform - methanol - tetrahydrofuran equimolar mixture with industrial separating agents are considered. The basic system shows opposite deviations from the ideal behavior, because it contains binary azeotropes with minimum and maximum boiling points (3.3.1-4 system according to Serafimov’s classification). The choice of selective substances for extractive distillation was carried out taking into account the concentration dependences of the excess molar Gibbs energy of the binary constituents of the derivative system “chloroform - methanol - tetrahydrofuran - industrial test agent (ethylene glycol (EG), dimethyl sulfoxide (DMSO), N-methylpyrrolidone (N-MP))” at 101.32 kPa. Based on the results of the evaluation of the thermodynamic criterion, DMSO and N-MP are recommended. Both agents show selective effect when separating two binary constituents. EG is selective only with respect to chloroform-tetrahydrofuran mixture. Since the tested agents show different selective effects, the final agent choice determines the qualitative composition of the product flows in the column for the extractive distillation of the three-component mixture (the first column of the flowsheet) and, accordingly, the structure of the total flowsheet. The schemes consist of two two-column complexes for extractive distillation (for the basic three-component mixture and for the binary mixture). The maximum contribution to the total reboiler energy consumption of the distillation columns is made by the first extractive distillation column: 65% (EG), 53% (N-MP) and 24% (DMSO). The use of the most selective agent reduces the energy consumption of this column: the reboiler load is maximal in the case of EG, in comparison with which the load is 47% lower in the case of N-MP and 76% lower in the case of DMSO.

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Separation of ternary mixtures by extractive distillation with 1,2-ethandiol and glycerol

Cited by 42 publications

References 12 publications

Molecular Simulation‐Assisted Solvent Selection for Separation of 1,2,4‐Trimethylbenzene

Molecular Simulation‐Assisted Solvent Selection for Separation of 1,2,4‐Trimethylbenzene

Process Simulation of the Separation of Aqueous Acetonitrile Solution by Pressure Swing Distillation

Selection of Extractive Agents for the Separation of Chloroform - Methanol - Tetrahydrofuran Mixture

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