Electrolytic reduction of alumina to aluminum by hallheroultprocess is carried out :
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Electrolytic reduction of alumina to aluminium by Hall–Heroult process is carried out : [JEE 2000 Qualifying] In the presence of NaCl. In the presence of fluorite. In the presence of cryolite which forms a melt with lower melting temperature.
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Known as the Hall-Heroult process after its American and French inventors, the process is still the primary method of aluminum production today. The Bayer process for refining aluminum ore, developed in 1888 by an Austrian chemist, also contributed significantly to the economical mass production of aluminum.
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