Separation process of butanol-butyl acetate-methyl isobutyl ketone system by the analysis to residual curve and the double effect pressure-swing distillation

Li, Chunli; Song, Yuanyuan; Fang, Jing; Liu, Yang; Su, Weiyi; Hu, Yuqi

doi:10.1016/j.cjche.2016.08.011

Cited by 22 publications

(4 citation statements)

References 6 publications

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“…When the number of theoretical stages of T 1 exceeded 16, the mass fractions of the top and bottom of the tower basically no longer change. The larger the number of theoretical stages, the better the separation effect, but the energy consumption and equipment cost also increase 38 . Therefore, the optimum number of theoretical stages of T 1 was determined to be 16.…”

Section: Resultsmentioning

confidence: 99%

Kinetics, mechanism, and simulation of hydrogen transfer reaction of α, β‐unsaturated aldehydes to allylic alcohols

Guo

Zuo

et al. 2022

AIChE Journal

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Homogeneous hydrogen transfer reactions of methacrolein (MAL) and isopropanol to methallyl alcohol (MAA) were investigated in batch reactor (Conv. 89%, Select 93.1%) and tubular reactor (Conv. 88.1%, Select 95%) using aluminum isopropoxide (Al(OPr i ) 3 ) as catalyst. Kinetic experiments on hydrogen transfer reactions and reaction order were investigated in batch reactor and tubular reactor. Response surface methodology was applied to optimize the optimum reaction conditions of hydrogen transfer reaction. Purification process of MAA from product mixture after hydrogen transfer reaction was simulated with Aspen Plus software; theoretical stages, reflux ratio, and feed stage of distillation tower were optimized. Density functional theory was used to investigate viable reaction pathway and to probe the catalytic mechanism between reactants and catalyst, including dehydrogenation, coupling, and hydrogenation reaction. Microscopic mechanisms of hydrogen transfer reaction from MAA to MAL were acquired in detail and could be easily extended to other series of hydrogen transfer reaction.

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Section: Resultsmentioning

confidence: 99%

Kinetics, mechanism, and simulation of hydrogen transfer reaction of α, β‐unsaturated aldehydes to allylic alcohols

Guo

Zuo

et al. 2022

AIChE Journal

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“…3 Kinetic energy and potential energy are ignored. 4 The pressure drop of the whole process is ignored. 5 The solution is under equilibrium condition.…”

Section: Performance Analysismentioning

confidence: 99%

“…However, due to the azeotrope formation of IPA and water, it is difficult to separate IPA and water by conventional distillation. In recent years, azeotropic distillation, , pressure-swing distillation, − liquid–liquid extraction process, pervaporation, − extractive distillation, − and other special distillation methods have been used to solve this problem. Among them, extractive distillation can remove the largest or smallest azeotrope by adding an extractant.…”

Section: Introductionmentioning

confidence: 99%

Molecular Mechanism, Thermoeconomic, and Environmental Impact for Separation of Isopropanol and Water Using the Choline-Based DESs as Extractants

Cui

Liu

Zhao

et al. 2020

Ind. Eng. Chem. Res.

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Deep eutectic solvents (DESs), as potential green solvents, can be used for the separation of the low-carbon alcohol azeotrope, which has become one of the hot spots in solvent research in recent years. In this work, choline chloride (ChCl)/glycerol (GI) (1:2) and ChCl/ethylene glycol (EG) (1:2) were used as extractants to study the extractive distillation process of isopropanol (IPA) dehydration. The high separation performance of the choline-based DESs was explained from the point of quantum chemistry. Economic impact, exergy loss, and environmental impact were compared between the new processes and the traditional process. The results displayed that the total cost of the two processes with DES as the extractant and using the heat pump process was reduced by 30.256, 30.918, and 36.229%, respectively. It saved a lot of cost and improved the thermodynamic efficiency. In terms of environmental impact, compared with the traditional process, the ChCl/GI (1:2) process reduced the emission of toxic and harmful substances by 39.94%, greatly improving environmental friendliness. The above results showed that the choline-based DESs performed excellently in the extractive distillation process for the separation of low-carbon alcohol azeotropes. Therefore, the development of new choline-based DESs is of great significance to the green, environmental protection and sustainable development of chemical and pharmaceutical industries.

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“…The separation of the simple binary CH3CN-Water mixture can be achieved by resolving the azeotrope through a differential pressure system [13]. The operating pressure indeed affects the composition of the azeotrope, allowing a straightforward separation [8,9,13,[18][19][20]. For instance, pressure swing has been compared by Cao et al as for costs and control options, also adopting a variable diameter column [21] and different feed temperature [22], for the following azeotropic mixtures: acetone-chloroform, acetone-methanol, methanol-chloroform, benzene-cyclohexane and isopropyl alcohol-diisopropyl ether.…”

Section: -Pressure Swing Feasibility Checkmentioning

confidence: 99%

Alternative integrated distillation strategies for the purification of acetonitrile from ethanol ammoxidation

Tripodi

Manzini

Compagnoni

et al. 2018

Journal of Industrial and Engineering Chemistry

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Acetonitrile is increasingly used as solvent for the fine chemicals and pharmaceutical industries. Ethanol ammoxidation has been proposed as an alternative way for its production starting from a renewable source. This process leads to a complex mixture of products, which needs an optimized separation train to maximize the recovery and purity of acetonitrile. Pressure swing distillation, operated at 7 and 10 bar, has been compared as for feasibility and economic impact with the extractive distillation using dichloromethane as entrainer. The pressure swing option led to higher CH3CN recovery (95.5%) with respect to extractive distillation (92.1%), irrespectively from the operating pressure. Furthermore, the pressure swing option allowed to tune more easily product purity by adding or removing trays in the stripping section of the high pressure column, leaving water as the only impurity. Similar results were obtained when operating the pressure swing between 1 and 7 bar or 1 and 10 bar, but the operation at 10 bar was characterised by lower installation and operating costs, thus it was considered as optimal. The same economical evaluation was carried out for the

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Separation process of butanol-butyl acetate-methyl isobutyl ketone system by the analysis to residual curve and the double effect pressure-swing distillation

Cited by 22 publications

References 6 publications

Kinetics, mechanism, and simulation of hydrogen transfer reaction of α, β‐unsaturated aldehydes to allylic alcohols

Kinetics, mechanism, and simulation of hydrogen transfer reaction of α, β‐unsaturated aldehydes to allylic alcohols

Molecular Mechanism, Thermoeconomic, and Environmental Impact for Separation of Isopropanol and Water Using the Choline-Based DESs as Extractants

Alternative integrated distillation strategies for the purification of acetonitrile from ethanol ammoxidation

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