American Institute of Chemical Engineers

Overview

The American Institute of Chemical Engineers (AIChE) is the professional home chemical engineers built for themselves in 1908 — founded in New York City by six engineers, headquartered there ever since, and today “a professional society of more than 60,000 members in more than 110 countries” working across corporations, universities, and government (Science History Institute; AIChE). Its founding purpose was a boundary fight: to distinguish chemical engineers as professionals independent of chemists and mechanical engineers. Its most consequential creation came 77 years later — the Center for Chemical Process Safety, formed in 1985 as the industry’s institutional answer to Bhopal. And like its fellow founders, AIChE was one of the seven societies that created the Engineers’ Council for Professional Development, now ABET, in 1932 (ABET).

The 1908 founding: a profession declares independence

The Institute was founded in 1908 by William M. Booth, Arthur D. Little, Charles F. McKenna, Richard K. Meade, John C. Olsen, and William H. Walker — its membership drawn from “chemical engineering professionals working in industry, academia, and government” (Science History Institute). The beginnings survive on paper: 61 documents, predominantly letters, chronicling 1907–1920, preserved at the Science History Institute in Philadelphia after their donation by Charles J. Knuth in 1997. The correspondents read like an honor roll of early industrial chemistry — Leo Baekeland, Arthur D. Little, Herbert Henry Dow among them.

The point of the new institute was separation. Chemical engineers were doing work that belonged fully to neither chemistry nor mechanical engineering, and the 1908 founding made the claim explicit: a distinct profession needed a distinct institution. The United States now had societies for civil (ASCE, 1852) and mechanical (ASME, 1880) engineers; AIChE completed the set for the engineers of the process industries.

Bhopal and the Center for Chemical Process Safety

Just after midnight on December 3, 1984, water contamination in a methyl isocyanate storage tank created a toxic gas release in Bhopal, India — “more than 3,000 fatalities and over 100,000 injuries to nearby residents” (AIChE). In February 1985, industry leaders asked AIChE to lead a collaborative effort to eliminate catastrophic process safety incidents. On March 25, 1985, the Institute formed the Center for Chemical Process Safety (CCPS) — a technical directorate within AIChE — which soon completed its first book, Guidelines for Hazard Evaluation Procedures.

CCPS became the industry’s process-safety memory. It has since published more than 100 books documenting the experience of process and process-safety engineers, and more than 280 organizations — “many of the world’s leading chemical, petroleum, pharmaceutical, mining, and related manufacturing companies” — participate in its work. Its stated vision is “a world without process safety incidents.” In April 2025 it marked 40 years at the 21st Global Congress on Process Safety in Dallas, Texas, held with AIChE’s Spring Meeting — the Institute’s largest conference for practicing chemical engineers, spanning nanotechnology, sustainability, hydrogen fuels, and biological and environmental engineering.

AIChE and ABET

AIChE’s fellow 1932 ECPD founders were the American Society of Civil Engineers, the American Institute of Mining and Metallurgical Engineers (now AIME), the American Society of Mechanical Engineers, the American Institute of Electrical Engineers (now IEEE), the Society for the Promotion of Engineering Education (now the American Society for Engineering Education), and the National Council of State Boards of Engineering Examiners (now NCEES) (ABET).

Timeline

• 1908 — Six engineers found AIChE in New York City.
• 1932 — AIChE co-founds the Engineers’ Council for Professional Development (now ABET).
• 1984 — The Bhopal gas release kills more than 3,000.
• 1985 — AIChE forms the Center for Chemical Process Safety.
• 2025 — CCPS marks 40 years; 100+ books, 280+ participating organizations.

Frequently asked questions

When was AIChE founded? In 1908, in New York City, by William M. Booth, Arthur D. Little, Charles F. McKenna, Richard K. Meade, John C. Olsen, and William H. Walker. Sixty-one founding letters (1907–1920) are preserved at the Science History Institute.

What is the Center for Chemical Process Safety? A technical directorate of AIChE, formed March 25, 1985, after the Bhopal disaster. It publishes process-safety guidelines (100+ books), runs the annual Global Congress on Process Safety, and counts 280+ participating organizations.

How big is AIChE? By its own account: more than 60,000 members in more than 110 countries, working in industry, academia, and government, headquartered in New York City.

What is AIChE’s connection to ABET? AIChE was one of seven engineering societies that founded ABET’s predecessor, the Engineers’ Council for Professional Development, in New York City in 1932.

Why was AIChE founded separately from other engineering societies? To establish chemical engineering as a profession independent of chemists and mechanical engineers — a boundary the 1908 founders made explicit in creating their own institute.

What this profile does not claim

This profile does not date the founding more precisely than 1908 or quote the 1905 founding editorial; both rest on the lead-index chain. It does not use an independently audited membership count — 60,000+ is AIChE’s own figure. It does not name current officers or quote revenue, which no fully-read source verified. The Bhopal toll figures are AIChE’s own stated account.