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The Distillation Staircase: How a 1925 MIT Paper Built the World's Chemical Refineries

Designing industrial chemical distillation towers once required hundreds of pages of tedious algebraic equations; Warren McCabe and Ernest Thiele calculated the exact height of towering distillation columns by drawing a simple staircase on graph paper. Published in 1925, the McCabe-Thiele method founded modern chemical engineering and is the separation design framework behind every petroleum refinery, pharmaceutical plant, and brewery on Earth.

Author
W. L. Mccabe et al.
Published
1925
Journal
Industrial & Engineering Chemistry
Last updated
September 2026
The Distillation Staircase: How a 1925 MIT Paper Built the World's Chemical Refineries

In the roaring 1920s boom of the automobile and petroleum industries, chemical plants needed giant fractionating towers to separate crude oil into gasoline, kerosene, and diesel. However, calculating how tall a tower needed to be required chemical engineers to spend weeks solving repetitive algebra by hand.

MIT researchers Warren McCabe and Ernest Thiele turned complex thermodynamics into a simple visual drawing. By plotting the boiling curve of two liquids on a single chart, an engineer can simply draw a geometric staircase between two lines—where each stair step directly represents one physical distillation tray inside the tower.

The McCabe-Thiele method became the most taught technique in chemical engineering history. By optimizing gasoline production during industrialization, by purifying life-saving pharmaceutical drugs, and by designing ultra-efficient chemical processing plants, graphical distillation shaped modern industrial manufacturing.

Reference

Mccabe, W. L., & Thiele, E. W. (1925). Graphical Design of Fractionating Columns. Industrial & Engineering Chemistry, 17(6), 605–611.

Title

Graphical Design of Fractionating Columns

Abstract

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGraphical Design of Fractionating ColumnsW. L. Mccabe and E. W. ThieleCite this: Ind. Eng. Chem. 1925, 17, 6, 605–611Publication Date (Print):June 1, 1925Publication History Published online1 May 2002Published inissue 1 June 1925https://pubs.acs.org/doi/10.1021/ie50186a023https://doi.org/10.1021/ie50186a023research-articleACS PublicationsRequest reuse permissionsArticle Views1831Altmetric-Citations256LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access options Get e-Alerts

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