Abstract
The methods available for producing high-purity iron can be classified broadly as chemical, electrochemical, and metallurgical. Of these, chemical and metallurgical methods have been used most extensively in the past. Electrolysis of aqueous solutions of iron salts, either with an inert anode when it is desired to produce iron from the salt, or with an iron anode when it is desired to transfer the metal in a purified form to the cathode, has not found much favour so far because the degree of purification, when it is applied in the straightforward manner, is not as high as with the other methods for certain elements which commonly occur as impurities. When it is regarded not so much as a purification process as a method of producing solid metal from a salt, it can be used as an intermediate stage in a more lengthy procedure.
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