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2016-02-16T21:47:17+05:30
The main ore is bauxite (Al2o3.h2o) Impurities-1.sand 2.silica (SiO2) 3.iron oxide (Fe2O3) Method involvec is bayers process 1.Al2O3+ 2NaOH→2NaAlO2 + H2O 2.NaAlO2 + 2H2O→NaOH + Al(OH)3 ↓ 3. 2Al(OH)3 →( in heat at 1000 C ) Al2O3 + 3H2O
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