11 research outputs found
New double column system for heteroazeotropic batch distillation
Get PDFA new double column system (DCS) operated in closed mode is suggested for heterogeneous batch distillation. This configuration is investigated by feasibility studies based on the assumption of maximal separation and is compared with the traditional batch rectifier (BR). We study the configurations also by dynamic simulation based on a detailed model using a professional simulator. For the new configuration the minimal duration of the process is determined. The influence of the most important operational parameters is studied. The calculations and the simulations are performed for a binary (n-butanol–water) and for a ternary heteroazeotropic mixture (isopropanol–water + benzene as entrainer). One of the advantages of the DCS is that distillation of binary and ternary systems is performed in only one step. Furthermore the recovery of components is usually higher and the amount of byproducts is lower
Separation of a Chloroform–Acetone–Toluene Mixture by Pressure-Swing Batch Distillation in Different Column Configurations
No full textFeasibility of reactive pressure swing batch distillation in a double column configuration
No full text
Comparison of Extractive and Pressure-Swing Batch Distillation for Acetone-Methanol Separation
No full text
Operation and Composition Control of a New Pressure Swing Batch Distillation System
Get PDFThe pressure swing separation of a binary minimum azeotrope (n-pentane-acetone) in a
double column batch stripper is studied by rigorous simulation. For controlling the
product compositions a simple scheme is presented. On the basis of temperatures of
bottoms product PID controllers manipulate their flow rates varying the reboil ratios.
The controllers are tuned. The influence of the most important operational parameter
(division ratio of liquid leaving the common top vessel) is investigated. For rigorous
simulation calculations a professional dynamic flowsheet simulator is applied
Feasibility of separation of ternary mixtures by pressure swing batch distillation
Get PDFFeasibility of the pressure swing batch distillation separation of ternary homoazeotropic mixtures in different single and double column configurations is investigated by assuming maximal separation. Feasibility regions where the ternary mixture can be separated into its pure components (by applying in at least one step pressure swing) and the separation steps for different configurations are determined. The method is presented for the most frequent types of ternary mixtures with minimum azeotrope(s)
Heterogeneous Extractive Batch Distillation of Chloroform - Methanol – Water : Feasibility and Experiments
Get PDFA novel heterogeneous extractive distillation process is considered for separating the azeotropic mixture chloroform – methanol in a batch rectifying column, including for the first time an experimental validation of the process. Heterogeneous heavy entrainer water is selected inducing an unstable ternary heteroazeotrope and a saddle binary heteroazeotrope with chloroform (ternary diagram class 2.1-2b). Unlike to well-known heterogeneous azeotropic distillation process and thanks to continuous water feeding at the column top, the saddle binary heteroazeotrope chloroform – water is obtained at the column top, condensed and further split into the liquid – liquid decanter where the chloroform-rich phase is drawn as distillate. First, feasibility analysis is carried out by using a simplified differential model in the extractive section for determining the proper range of the entrainer flowrate and the reflux ratio. The operating conditions and reflux policy are validated by rigorous simulation with ProSim Batch Column® where technical features of a bench scale distillation column have been described. Six reproducible experiments are run in the bench scale column matching the simulated operating conditions with two sequentially increasing reflux ratio values. Simulation and experiments agree well. With an average molar purity higher than 99%, more than 85% of recovery yield was obtained for chloroform and methanol
Author response: Stromule extension along microtubules coordinated with actin-mediated anchoring guides perinuclear chloroplast movement during innate immunity
No full text
