Héroult, Paul
Published: January 17, 2009, 1:28 pm
Updated: January 17, 2009, 1:28 pm
This article has been reviewed by the following Topic Editor:
Peter Saundry Discovered in 1827 by Friedrich Wöhler, aluminum, though the most common metal on earth, is always found tightly locked in compounds. Efforts to use electrolysis to reduce it failed repeatedly, and for years it remained an exotic metal used in jewelry and for such special purposes as capping the Washington Monument.
The race for a commercially viable route to aluminum was won in 1886 by two young men working independently—Paul Héroult (1863–1914) in France and Charles M. Hall (1863–1914) in the United States.
The problem many researchers had with extracting aluminum was that electrolysis of an aluminum salt dissolved in water yields aluminum hydroxide. Both Hall and Héroult avoided this problem by dissolving aluminum oxide in a new solvent-fused cryolite, Na3AlF6.
With the new aluminum electrolytic reduction process, called the Hall-Héroult process, the price of aluminum dropped dramatically. Developments in the early 1880s had reduced the price of a pound of aluminum from 12 dollars to 4 dollars a pound. The Hall-Héroult process reduced it to 2 dollars a pound, then again to 30 cents.
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Chemical Heritage Foundation (Lead Author);Peter Saundry (Topic Editor) "Héroult, Paul". In: Encyclopedia of Earth. Eds. Cutler J. Cleveland (Washington, D.C.: Environmental Information Coalition, National Council for Science and the Environment). [First published in the Encyclopedia of Earth January 17, 2009; Last revised Date January 17, 2009; Retrieved May 21, 2013 <http://www.eoearth.org/article/H%C3%A9roult,_Paul>
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The Chemical Heritage Foundation (CHF) serves the community of the chemical and molecular sciences, and the wider public, by treasuring the past, educating the present, and inspiring the future. CHF maintains a world-class collection of materials that document the history and heritage of the chemical and molecular sciences, technologies, and industries; encourages research in CHF collections; and carries out a program of outreach and interpretation in order to advance an understanding of the ro ... (Full Bio)
Discovered in 1827 by Friedrich Wöhler, aluminum, though the most common metal on earth, is always found tightly locked in compounds. Efforts to use electrolysis to reduce it failed repeatedly, and for years it remained an exotic metal used in jewelry and for such special purposes as capping the Washington Monument.
The race for a commercially viable route to aluminum was won in 1886 by two young men working independently—Paul Héroult (1863–1914) in France and Charles M. Hall (1863–1914) in the United States.
The problem many researchers had with extracting aluminum was that electrolysis of an aluminum salt dissolved in water yields aluminum hydroxide. Both Hall and Héroult avoided this problem by dissolving aluminum oxide in a new solvent-fused cryolite, Na3AlF6.
With the new aluminum electrolytic reduction process, called the Hall-Héroult process, the price of aluminum dropped dramatically. Developments in the early 1880s had reduced the price of a pound of aluminum from 12 dollars to 4 dollars a pound. The Hall-Héroult process reduced it to 2 dollars a pound, then again to 30 cents.
Further Reading
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Paul Héroult. (Source: ASM International Golden Gate Chapter at the University of California at Davis)
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