scholarly journals Simulation and Optimization of the Phosgenation Reactive Distillation Process for Producing Toluene Diisocynate

2021 ◽  
Author(s):  
Rong Bi ◽  
Xiaoyang Sun
Keyword(s):  
Reactive Distillation ◽  
Optimal Operation ◽  
Production Equipment ◽  
Toluene Diisocyanate ◽  
Total Annual Cost ◽  
Thermal Coupling ◽  
Distillation Process ◽  
Industrial Installation ◽  
Simulation And Optimization ◽  
Cold Energy

Toluene diisocyanate (TDI) is an important chemical intermediate prepared by phosgenation reaction between toluene diamine and phosgene with two steps name cold and thermal phosgenation respectively. In this paper, the reactive distillation model for the thermal phosgenation reaction based the kinetics equations was established for an industrial installation, and the effects of the different parameters on the process performance were studied firstly; then based on the analysis results, a thermal coupling process between the towers of reactive distillation and phosgene purification was presented and investigated; finally, the optimal operation scheme was simulated and the results showed that the proposed process can save the heat and cold energy with 7.29% and 32.78%, respectively, and reduce the total annual cost about 17.11%. The result of the paper can be used to guide the operation configuration or the revampment of the TDI production equipment.

Novel reactive distillation process with two side streams for dimethyl adipate production

2017 ◽  
Vol 118 ◽  
pp. 9-18 ◽  
Author(s):  
Na Yu ◽  
Lumin Li ◽  
Mengqi Chen ◽  
Jianxin Wang ◽  
Dan Liu ◽  
...  
Keyword(s):  
Reactive Distillation ◽  
Distillation Process ◽  
Dimethyl Adipate

scholarly journals Analysis of Different Pressure Thermally Coupled Extractive Distillation Column

2014 ◽  
Vol 8 (1) ◽  
pp. 12-18 ◽  
Author(s):  
Lanyi Sun ◽  
Kang He ◽  
Yuliang Liu ◽  
Qiuyuan Wang ◽  
Dingding Wang
Keyword(s):  
Sensitivity Analysis ◽  
Distillation Column ◽  
Extractive Distillation ◽  
Total Annual Cost ◽  
Operating Parameters ◽  
The Novel ◽  
Economic Aspects ◽  
Distillation Process ◽  
Aqueous Acetonitrile ◽  
New Process

In this contribution, a different pressure thermally coupled extractive distillation process has been applied on the separation of propylene and propane with aqueous acetonitrile (ACN) solution as entrainer. The novel distillation pro-cess integration is the combination of different pressure thermally coupled distillation (DPTCD) and extractive distillation (ED). Both the new process and the conventional process have been simulated in Aspen Plus. Sensitivity analysis has been conducted to select an appropriate compression ratio and other operating parameters based on the priority that the propylene product purity is 99.2 wt % and less energy consumption. The influence of the proposed distillation column on energetic and economic aspects is evaluated through intensive comparison against the conventional stand-alone column, and better performance is achieved with up to 46.02% energy saving and close to 9.7% saving in total annual cost (TAC).

scholarly journals Vapour reactive distillation process for hydrogen production by HI decomposition from HI–I2–H2O solutions

2008 ◽  
Vol 47 (3) ◽  
pp. 396-407 ◽  
Author(s):  
B. Belaissaoui ◽  
R. Thery ◽  
X.M. Meyer ◽  
M. Meyer ◽  
V. Gerbaud ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Reactive Distillation ◽  
Distillation Process
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