Recovery of Acetic Acid from Aqueous Solutions by Reactive Distillation

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• 作者：Ajay Singh ; Anand Tiwari ; Sanjay M. Mahajani ; and Ravindra D. Gudi
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2006
• 出版时间：March 15, 2006
• 年：2006
• 卷：45
• 期：6
• 页码：2017 - 2025
• 全文大小：248K
• 年卷期：v.45,no.6(March 15, 2006)
• ISSN：1520-5045

文摘

The recovery of acetic acid by reactive distillation through esterification with methanol in the presence ofion-exchange resin as a catalyst has been investigated in detail. A kinetic expression that is valid under theconditions that prevail in a continuous reactive distillation column has been developed. The insensitivity ofreaction rate to catalyst loading under certain conditions has been addressed. The recovery as high as 80%was realized experimentally for the feed concentration of 30% (w/w) in a laboratory column. Various alternativescenarios such as effect of reboiler duty, feed flow rate, and feed composition were covered in the experiments.The equilibrium stage model for reactive distillation predicts the performance well in agreement with theexperimental results. The effect of changing various design and operating parameters, over a wide range, wasalso studied through simulation. The model predicts close to quantitative recovery (~100%) with a properlydesigned column. Some feasible alternative configurations for a complete recovery system have been suggested.