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Electricity in the following types of electrolysis:

  • Electro-organic synthesis of fine organics and intermediates such as adiponitrile

  • Gold and silver electrolysis, and the electrolytic dissolution of platinum group metal alloys and alkali earth metals such as sodium, potassium, lithium and calcium

  • Electrolysis to purify materials (as distinct from electrowinning)

  • Electrolysis in refining tin or copper from impure metals or ingots

  • Electrolysis involving sodium chlorate, potassium permanganate, potassium dichromate, managanese dioxide, cuprous oxide, sorbitol, fatty alcohols