Event of 1886: American inventor Charles Martin Hall files a patent for his inexpensive method
- When
- 1886
- Where
- United States and France
- Episodes
- 1
Charles Martin Hall, an American inventor, developed an inexpensive method for producing aluminium in 1886. This process, involving the electrolysis of alumina dissolved in cryolite, was discovered independently by Paul Héroult. Hall filed his patent on July 9, 1886, leading to the commercialization of aluminium as an affordable commodity rather than a precious metal.
Episodes
Background and detail
Invention. Hall discovered the basic invention on February 23, 1886, by passing an electric current through a bath of alumina dissolved in cryolite. This resulted in aluminium forming at the bottom of the retort. The process was discovered independently and almost simultaneously by the Frenchman Paul Héroult, leading to the name Hall–Héroult process.
People involved
- Charles Martin Hall · American inventor, businessman, and chemist
- Paul Héroult · Frenchman who independently discovered the process
Sources
- Charles Martin Hall Wikipedia, revision of 2026-03-03
- Hall–Héroult process Wikipedia, revision of 2026-09-17
Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.