Fractional crystallization in acid solution
dissolution in sodium hydroxide and filtration
extraction with concentrated ammonia and reprecipitation
electroysis of molten mixture
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The explanation you are looking for is here,During Bayer process, bauxite ore is dissolved in sodium hydroxide under high pressure and temperature, the aluminum oxide component reacts to form sodium aluminate which is soluble, leaving behind other insoluble impurities which can be filtered off.
adim pls try to explain more on your quest it is not all of us here that knw the answer...expecially in physic,chemistry nd maths pls try nd explain or even if it the formula pls work on that...
PURIFICATION OF BAUXITE: The BAUXITE is first heated with caustic soda (NaoH) solution under pressure to form soluble aluminate (iii) and the filtered.
