METHOD FOR THE PRODUCTION OF ALUMINIUM HYDROXIDE FROM BAUXITE
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United States of America
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Mar 20, 2025
app pub date -
Oct 7, 2022
filing date -
Oct 7, 2022
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Abstract
A method for the production of aluminium hydroxide (Al(OH)3) is described wherein in a first tank a first aqueous solution of sodium aluminate (NaAl(OH)4) is provided and carbon dioxide (CO2) gas is added to the first tank to form a first aluminium hydroxide precipitate, and wherein a second tank containing a second aqueous solution of sodium aluminate is provided, wherein the sodium aluminate solution in the second tank is supersaturated and seed crystals are added to the second tank to form a second aluminium hydroxide precipitate. At least a fraction of the first aluminium hydroxide precipitate obtained from the first solution in the first tank is seeded into the second tank and/or at least a fraction of the second aluminium hydroxide precipitate obtained from the second solution in the second tank is seeded into the first tank.
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