Electrolysis in Molten Cryolite - Basis for Modern Aluminum Production

Electrolysis in Molten Cryolite - Basis for Modern Aluminum Production 3 7.2.4.1 Time for Change 

During the last two decades of the 19 century, people in Europe and America entertained a great interest in technology and science. The metal aluminum fascinated -the silvery appearance, the low weight and the good corrosion resistance. But it was a semi-precious metal and very costly, used mostly for jewelry and artwork. A demonstration of that was a cap of aluminum placed on the top of the Washington monument in 1884. 

When Hall continued his studies in physical chemistry and thermochemistry, he got the idea that he should find a substance, other than water, that could dissolve alu- 

Judge Taft, later President Taft, decided in favor of Hall, saying that Hall s process is a new discovery and a step forward in the art of making aluminum. Hall was a pioneer, and is entitled to the advantages which that fact gives him in the patent law.  

These first globules are carefully preserved as the Crown Jewels of the Aluminum Company of America (Alcoa), in Pittsburgh. Alcoa, founded on Hall s invention, is today a company with more than 50000 employees. 

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