ISA Interchange

Welcome to the official blog of the International Society of Automation (ISA).

All Posts

Batch Distillation Employing Cyclic Rectification

This post is an excerpt from the journal ISA Transactions.  All ISA Transactions articles are free to ISA members, or can be purchased from Elsevier Press.

Abstract: Several strategies have been proposed to increase the operating efficiency of batch distillation. In this study, chemical-plant-distillation-technicalconventional batch rectification and inverted batch stripping are used cyclically to promote high product flow rates for a binary fractionation. Process controls are implemented to maintain constant product purity specifications by varying the slope of the operating line. While rectifying, the light component is removed as distillate, concentrating the heavy component in the reboiler. As a result, the distillate rate decreases with time. The column is then changed from rectification to stripping modes, and the heavy component is removed as bottoms product, concentrating the light component in the distillate drum. This causes the bottoms rate to diminish with time, and the column is once again converted back to rectifying mode. Cyclic operation, transitioning from batch rectifying to stripping back to rectifying, continues until all of the initial charge is fractionated or is combined with a new charge. The fractionation of ethanol and 1-propanol using the proposed operating strategy is shown to provide several advantages including energy and time savings when compared to conventional batch or inverted batch distillation alone.

 Free Bonus! To read the full version of this ISA Transactions article, click here.

Join ISA and get free access to all ISA Transactions articles as well as a wealth of other technical content, plus discounts on events, webinars, training & education courses, and professional certification.

Click here to join ... learn, advance, succeed!

2006 Elsevier Science Ltd. All rights reserved.

Related Posts

Newsweek Vantage Report on Cyber Risks to Critical Infrastructure: ISA's the Expert Partner

Newsweek Vantage recently published an independent report on cyber risks to critical infrastructure—and t...
Kara Phelps Mar 24, 2020 3:11:27 PM

Auto Manufacturers Could Build Ventilators: The Power of Standards in a Global Crisis

As COVID-19 shutters manufacturing plants in North America and around the world, GM, Ford, and Tesla are ...
Kara Phelps Mar 19, 2020 1:49:27 PM

Leveraging Technology to Work in the Age of Uncertainty

Globalization has been a very successful strategy for many businesses. Distributing the supply chain acro...
Contributing Author Mar 18, 2020 5:00:00 AM