Ekstraksi Alumina (Al2O3) dari Mineral Tanah Napa Pesisir Selatan

— Alumina has a wide range of industrial and technical applications and can be extracted from different locations, materials and methods. Napa soil from the Pesisir Selatan has been used as a raw material for alumina production. This alumina extraction process is the result of modifications to several methods including alkali fusion and hydrothermal methods. Napa soil is calcined at 750 0 C for 4 hours and washed with hydrochloric acid 1,5 M; 2 M; 2.5 M at 95 0 C, followed by alkali fusion by NaOH 10 M so that it is obtained Al(OH) 3 and converted to Al 2 O 3 with the calcination of 1100 0 C. The extraction results are characterized by XRF technology to understand the content of the analyzed sample. The extraction mass of alumina with different concentrations of HCl 1 M; 1,5 M; 2 M; 2.5 M is continuous 14,171 g; 41,127 g; 31,711 g; and 0 g. The result of XRF analysis of alumina extraction showed that the Al 2 O 3 content increased by 68.42%.