The partial heat-integrated pressure-swing reactive distillation process for transesterification of methyl acetate with isopropanol

Suo, Xiaomeng; Ye, Qing; Li, Rui; Dai, Xin; Yu, Hao

doi:10.1016/j.cep.2016.06.008

Cited by 34 publications

(10 citation statements)

References 25 publications

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“…Common special distillation methods are azeotropic distillation, 2-6 extractive distillation (ED) [7][8][9] and pressure-swing distillation. [10][11][12] ED is a separation method which changes the relative volatility of the original components after adding solvent. In this way, the pure compositions can be obtained at the top of the distillation column, while the entrainer and heavy compositions gather at the bottom of the column.…”

Section: Introductionmentioning

confidence: 99%

Dynamic control of heat pump assisted extractive distillation process for separation of ethyl acetate/isopropanol/water mixture

Shan

Niu

Meng

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND: Controlling the behavior of processes for the recovery of ethyl acetate and isopropanol from industrial wastewater is a hot topic. In this work, dynamic control structures of the extractive distillation process and heat pump combined with feeding preheating extractive distillation process are researched. The control performance of the proposed control structures is tested by adding feed flow and composition disturbance. In these two processes, two-point temperature control structure is first used. RESULTS:The results show that this structure can maintain product purity within a reasonable range under disturbance. Furthermore, the composition controller is used to improve control performance.CONCLUSION: The improved structure can effectively meet the requirements of product purity. The heat pump combined with feeding preheating extractive distillation process can use the same control structure as the extraction process and show good controllability. This study has a certain guiding value for the research of chemical dynamic control.

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Section: Introductionmentioning

confidence: 99%

Dynamic control of heat pump assisted extractive distillation process for separation of ethyl acetate/isopropanol/water mixture

Shan

Niu

Meng

et al. 2021

J of Chemical Tech & Biotech

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“…In recent years, reactive distillation has been widely studied due to its simple process, low energy consumption, and improved product purity and selectivity. [21][22][23][24][25][26][27] For example, Lee et al [28] studied the thermodynamic and kinetic parameters of nbutyl levulinate synthesized by reactive distillation. Alvarez-Contreras et al [29] selectively synthesized ethyl methyl carbonate by catalytic reactive distillation.…”

Section: Introductionmentioning

confidence: 99%

Kinetics and catalytic distillation simulation for the heterogeneously catalytic synthesis of imine

et al. 2021

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(2‐methyl‐6‐ethylphenyl)‐1‐methoxypropyl‐2‐imine (MEMI) is an important intermediate for the synthesis of commercial pesticide S‐metolachlor. However, the research on heterogeneously catalytic kinetics of MEMI, and further the catalytic distillation simulation aiming at continuous operation, have never been reported. Herein, the catalytic kinetics for the synthesis of MEMI by HPW/Al‐MCM‐41 have been systematically investigated, and further fitted by using a pseudo‐homogeneous kinetic model, based on which, the reaction equilibrium constant, activation energy, and rate constant are obtained. Furthermore, simulation of the continuous process of MEMI synthesis was carried out using the software Aspen Plus V10. Sensitivity analysis of operating parameters such as feed stage, distillation rate, number of reactive theoretical stages, and the best operating conditions were also obtained. An excellent product purity (>98.9%) of MEMI could be achieved when operated at the optimum conditions. Compared with the batch method, catalytic distillation provided continuous synthesis of MEMI, and the reaction was more thorough, achieving process integration and optimization. Our results provide substantial theoretical and empirical supports for the industrial synthesis of MEMI.

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“…[16][17][18][19] ; (b) the coupling of special distillation and reactive distillation to effectively break (or reduce, convert) the complex azeotropic system, thereby reducing the use of excessive reactants and improving product quality, such as azeotropic reactive distillation, reactive extractive distillation, pressure-swing reactive distillation (PSRD). [20][21][22][23] Regarding the two-column process of isobutyl acetate synthesis, the temperature difference between the top and bottom of the RD column exceeds 70 C. Pleşua et al [24] reported the installation cost of compressor exorbitant for large temperature difference systems. In addition, the energy efficiency of RDWC is not continuously high because all its heat duty is added to the bottom reboiler at the highest temperature or all its cold duty is removed from the top condenser at the lowest temperature.…”

Section: Introductionmentioning

confidence: 99%

Rigorous design and control of thermally integrated pressure‐swing reactive distillation process for isobutyl acetate production considering the effect of column pressures

Zhang

Liu

et al. 2020

Can J Chem Eng

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By studying the effect of pressure on relative volatility, azeotrope composition, and net reaction rate, a rigorous pressure-swing thermally integrated reactive distillation (PST-RD) process for isobutyl acetate synthesis is proposed. The steady-state and dynamic characteristics of the PST-RD process are evaluated based on Aspen and Aspen Dynamic. Steady-state optimization results show that the energy consumption and the total annual cost (TAC) reduced by 42.32% and 34.20% compared with the conventional two-column process, respectively. Subsequently, two control structures of the PST-RD process under a rigorous model are developed and evaluated by large disturbances in throughput and feed composition. Dynamic simulation results show that peak dynamic transients can be effectively reduced by adding a Q/F feedforward control structure. Furthermore, the effective heat integration of high-pressure (HP) and low-pressure (LP) columns can be realized by implementing composition/pressure cascade control when the capacity of the LP column increases.

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The partial heat-integrated pressure-swing reactive distillation process for transesterification of methyl acetate with isopropanol

Cited by 34 publications

References 25 publications

Dynamic control of heat pump assisted extractive distillation process for separation of ethyl acetate/isopropanol/water mixture

Dynamic control of heat pump assisted extractive distillation process for separation of ethyl acetate/isopropanol/water mixture

Kinetics and catalytic distillation simulation for the heterogeneously catalytic synthesis of imine

Rigorous design and control of thermally integrated pressure‐swing reactive distillation process for isobutyl acetate production considering the effect of column pressures

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