a) What are the main impurities in bauxite?How are these impurities removed?
b)How would you prepare aluminium from pure alumina. Give reactions and conditions
Answer the above question if only the answer is known
b)How would you prepare aluminium from pure alumina. Give reactions and conditions
Answer the above question if only the answer is known
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Answer:
(a) ans :- The major impurities in Bauxite are iron oxides , hematite , silicon dioxide, the clay mineral kaolinite as well as small amounts of anatase .
it removed by leaching a bauxite ore using a leach solution to dissolve impurities from the bauxite ore and form a pregnant leach solution containing the impurities in solution
(b) ans :- we can prepare aluminium from pure aluminum oxide compound called alumina is dissolved at 950 °C (1,750 °F) in a molten electrolyte composed of aluminum, sodium, and fluorine; this is electrolyzed to give aluminum metal at the cathode and oxygen gas at the anode.