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Leaching of alumina from bauxiteexplain simply​

Answer»

Answer:

Bauxite usually contains silica, iron oxide, and TITANIUM oxide as impurities. In the process of LEACHING, alumina is CONCENTRATED by digesting the powdered ore with a concentrated solution of NaOH at 473-523K and 35-36 bar. Under these conditions, alumina dissolves as SODIUM silicate LEAVING the impurities behind

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