Goldschmidt
Goldschmidt : The German company Th. Goldschmidt A.G., founded in 1847, has developed many processes, including the Thermite process, and many for extracting and recovering tin. The process with which its name is usually associated is one for purifying tin metal by adding aluminum in order to precipitate out arsenic and antimony. Air is then blown into the molten metal, forming a surface scum containing these impurities, which is removed after cooling. Aprocess for removing tin from tinplate by chlorination has also been known by this name
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