Design and Control of Heterogeneous Azeotropic Distillation for Separating 2‐Methylpyridine/Water

Abstract

In industrial processes, 2‐methylpyridine/water mixtures can be separated via the conventional heterogeneous azeotropic distillation (HAD) using benzene as entrainer. 2‐Methylpyridine and water can form a heterogeneous azeotrope by themselves, based on which an improved HAD process is proposed. This allows for reducing the total operating cost and total annual cost (TAC) by more than one‐tenth compared with the conventional HAD process. Two different control structures were established for the enhanced HAD process. The results indicate that applying the feedforward ratio controllers to the control structure can handle the feed disturbances and maintain product purities with smaller transient deviations and shorter settling times.

Optimization of a New Integrated Separation Process for Azeotropes Based on Genetic Programming

“…-The first parameter is the character parameter representing different branches of the node n C 1) . All distillation column nodes have two output ends.…”

“…The separation of azeotropic systems has always been the focus of research in the field of chemical separation [1,2]. Higher separation efficiency and lower separation cost are the goals of chemical companies and researchers [3,4].…”

Production of gasohol by azeotropic distillation

“…Wang et al [ 6 ] introduced an optimization method utilizing the simulated annealing algorithm, revealing that this approach offers advantages such as a high probability of achieving global optimality, automated calculation, and a short computational time. Chen et al [ 7 ] utilized conventional heterogeneous AD to separate the 2‐methylpyridine/water mixture. They also presented an enhanced heterogeneous AD process by leveraging the inherent heteroazeotropic nature of 2‐methylpyridine and water.…”

Vapor–Liquid Equilibrium for Binary of 1-Butanol + N,N-Dimethylacetamide and Methyl Isobutyl Ketone + N,N-Dimethylacetamide at 101.3 kPa

“…It can also be used as an extraction agent, diluent, active agent, and organic synthesis raw material. , Therefore, the separation of mixtures containing 1-butanol and MIBK from industrial production is of great environmental and economic importance. However, 1-butanol and MIBK could form an azeotrope, which is difficult to be separated by ordinary distillation. , The common special distillation methods are pressure-swing distillation, − azeotropic distillation, − and extractive distillation. − The role of extractive distillation in the separation of azeotropes is extremely important. Furthermore, the choice of extractant , in extractive distillation has a decisive effect on the separation of the azeotrope.…”