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Gibbsite is generally precipitated from sodium aluminate liquor in the presence of huge quantity of gibbsite seed at a temperature between 60 and 70 °C. This gibbsite is then calcined to produce alumina. Boehmite is a stable phase at higher temperature (>100 °C) and formation of boehmite below 100 °C in supersaturated sodium aluminate liquor is unusual. In the present study an attempt has been...
In Bayer process gibbsite (alumina trihydrate, Al 2 O 3 ·3H 2 O) is precipitated from sodium aluminate liquor for production of alumina by calcination. Precipitation of boehmite or alumina monohydrate (Al 2 O 3 ·H 2 O) is an alternative method for production of alumina. Boehmite is also a good precursor material for production of different activated...
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