Process for the electrolytic production of pure aluminum SUBSTANCE: The process involves the use of anodes containing two-phase metallic copper-based and iron-based alloys, which also contain small amounts of nickel, consisting of an iron-rich reactive phase and a copper-rich solid inert phase, which are 30 to 77 Wt .-% copper, 23 to 65 wt .-% iron and 15 wt .-% nickel [...]