The process by which aluminum hydroxide is converted into aluminum oxide is —

The procedure by which aluminum hydroxide is changed over into aluminum oxide is — 

Aluminum is found in shifting sums in nature as aluminosilicates (contains aluminum, silicon, and oxygen) in different sorts of mud. As the minerals are weathered they step by step breakdown into different types of hydrated aluminum oxide, Al2O3.xH2O, known as bauxite. The bauxite is decontaminated by the Bayer Process. To begin with the mineral is blended with a hot concentrated arrangement of sodium hydroxide. The NaOH will disintegrate the oxides of aluminum and silicon however not different polluting influences, for example, press oxides, which stays insoluble. The insoluble materials are evacuated by filtration. The arrangement which now contains the oxides of aluminum and silicon are next treated by foaming carbon dioxide gas through the arrangement