Fused salts are widely used in many industrial processes needing to free the limitations arising
from the use of aqueous solutions. In connection with their exceptional properties, fused
media offer a vast panel of uses: their wide potential window between decomposition limits
allows the electro-winning of highly electropositive elements or the preparation of very electronegative
elements. Their thermal stability and generally low vapor pressure are well
adapted to high-temperature chemistry, enabling fast reaction rates. Their ability to dissolve
many inorganic compounds such as oxides, nitrides, carbides, and other salts makes them
ideal solvents useful in electrometallurgy, metal coating, treatment of by-products, and
energy conversion. It is recalled that one of the most important chemicals produced in
the world, sulfuric acid, is made by a molten salt catalysis.